A nice thought experiment, but completely ignorant to the reality of what's happening to Archie's body, and what's to come.
This is why I wish these facebook commenters and internet philosophers would stay in their lane and listen to the fucking medical professionals who've dedicated their careers to understanding human physiology and caring for the very real human beings in front of them.
What's going to happen if treatment continues?... Archie's body will undergo multiorgan failure. His kidneys will stop producing urine as toxic byproducts accumulate, turning his blood acidic. His body will be unable to digest his feeds, leading to vomiting and bloating. His skin will develop necrotic sores. His lungs will continue to fill with thick secretions that have to be suctioned constantly, he might even have to be proned (laid onto his belly) in a last ditch effort to help his lungs get slightly better blood flow and expansion.
But dying on your stomach with your face shoved into the mattress, plastic tubes in every orifice, while nurses frantically push medications into your veins and your parents watch helplessly isn't all that bad, right?
Is my educational or professional background really of your concern? The irony is that you have actually gotten my professional and informal interests reversed.
I assisted (more so observed) an TICU in the early stages of my career (not the NHS - this was not in the UK). There was a patient with multiple spinal injuries whose case hopeless - it was remarkable she even made it to the hospital. Her husband refused to permit for anything but continued treatment as long as she was still moving, but at that point it was only a matter of time before she coughed up her lungs and her immature fetus came out.
Before that could happen, another patient arrived, one who would almost certainly survive with the proper attention. Being understaffed that day, it was decided to prioritise a viable case before what was essentially the task of helping a dreadfully unfortunate woman die. Still, the husband refused but all words fell an deaf ears, and it ended up falling to me the task of quite literally dragging him away - if things had been done as he wished he would simply have witnessed the grisly aforementioned. The patient was left in the hands of a skeleton team effectively tasked with putting her to sleep. The other patient made a full recovery.
The husband is now in prison; he came back later in the week and tried to stab people (myself amongst them) with a knife. Nobody was seriously injured, but the location and purposeful nature of the assault led the court to sentence him to death. The words of victims carrying weight in such cases, I was successful in begging for his life and the death sentence was reprieved on condition of good behaviour.
Speaking to him some time later, I was told he initially arrived at the hospital expecting and reconciled to finding his wife dead already, and even when preparing for his trial came to comprehend the thorough medical evidence showing that her death was an inevitability. However, being told she was as good as dead whilst seeing her still showing signs of life right in front of him was something different. Being prepared for the worst and suddenly being given a slither of (false) hope, he at the time chose to remain convinced she had been left to die rather than accept that the unfortunate accident decided her fate, and by the time he came to realise otherwise, it was too late for him.
Whilst acknowledging my experiences are a potential source of bias, I am telling you all this in the hopes you might understand something surprisingly overlooked: people don't appreciate being talked down to. Unfortunately, a belief that one's education and experience alone merit a deference to one's opinion is a rampant trend nowadays, especially in highly professionalised disciplines such as law, medicine, and education. Ironically, often the individuals in the middle of the hierarchy of achievement are those who flaunt their qualifications and credentials as signs of authority, whereas those truly attaining the highest levels of knowledge and competence tend to be more self-aware yet capable of getting their ideas across without having to first list their credentials; as I wrote earlier 'the more one knows the more one realises they do not yet know'. What I previously posted was indeed philosophy, as the natural sciences are derived from philosophical reasoning, and any decent scientist (medics included) should have an appropriate sense of humility.
Telling people what is best for them or their loved ones in times of great anxiety and stress is often not received as goodwill but arrogance, unless it is accompanied with adequate instruction. Rather it should be the duty of decent professionals to provide others with as much information as is necessary when they require it. Yes different individuals may require different means and degrees of thoroughness of convincing; some may benefit from explanations as thorough as those for medical students.
In retrospect, had the aforementioned husband been permitted to witness his wife's death, however horrific and dreadful an experience it might have been, without care having been withdrawn and he himself confined to a distant corridor, he may have been able to come to terms with what happened without anyone having suffered knife wounds or imprisonment. He went over the ledge because he was not allowed to accept death on the terms and evidence acceptable to him. Proper care is not merely looking after a patient, but also all those in the patient's life.
Hollie does not seem to be the sort of person to barge into a hospital wielding a machete, but if Archie goes in a manner which leaves her army in doubt, they can - and regrettably it is likely that they will - besiege the NHS and the legal system with lawsuits ranging from negligence to murder. There also needs to be an inquiry into Archie's accident, and having the most important witnesses in a state of mind where they think all of the national institutions are against them is not going to benefit anyone.
That Archie's expiration going on like this would not be pleasant is without question. Although those responsible for his care are justified in thinking that putting an end to all this prior to it reaching that point is doing everyone a favour, it should be abundantly clear by now that Hollie et al. are not prepared to accept that Archie is gone in such a manner. It appears that they would accept that if Archie expired whilst on LS and receiving all treatment available that all that can be done has been done. As unpleasant as it may sound, the shock of experiencing Archie's expiration on those terms, however tragic and horrid, might be what those people need to cope with what has happened without permanently lingering 'what-ifs'. Minimising controversy and increasing certainty is also in the public's interest.
A quick note on dignity: it is a subjective concept which is understood differently depending on tradition, culture, and class. A person taking their final breaths in an aesthetically pleasing manner is 'dignified' to some but to others a mere spectacle to make the living feel better (similar to how in war there are those cultures where it is possibly to surrender with honour facing certain defeat whereas others consider the act of fighting to the death against hopeless odds paramount to the expression of 'national dignity'). Objectively, one has dignity when they have respect, and surely few decent people will deem the boy less worthy of respect if his final moments are spent struggling on LS?