I've talked to a couple of people who think self-diagnosis is a legit thing and the main takeaways I had from it were:
- What if doctors fuck it up? Doctors aren't always right.
- What if doctors fuck it up ON PURPOSE? Doctors are evil.
To which you merely need to say:
- What if you fuck it up? You aren't always right
- What if you fuck it up ON PURPOSE? You know, for attention and shit.
This is probably the biggest issue I have with tumblr at the end of the day. It's pretty much the same thing to me as those people who go into support chat rooms and pretend to have cancer or some other awful illness so they can get pity and support; it's pathetic and insensitive.
One of the biggest issues I have with it all is the recent craze in the BPD self-dx in particular, which has resulted in an upswing of "BPD" tumblrinas crying "oppression + ableism" when they find articles/books written for people in relationships with someone with BPD, since those books would dare to suggest it might be a difficult situation for both individuals (i.e. the BullshitPD snowflake and the NTscum partner).
That and the fact that they find every relatable text post with like 500k notes on it and declare it a symptom of their disorder and that anyone who reblogs it is like... Appropriating neurodivergent culture or something. And the points about toxic self-care advice that circulate and lead people (especially younger kids who don't know better) down the wrong path are also very disturbing aspects of this whole thing.
I always kind of assume the people claiming 4+ disorders/disabilities-of-the-week are full of shit, while the ones who don't say shit about themselves or whether they're "neuroatypical" or not are the ones who are most likely to have some real shit going on with them.
You can do brain scans to detect things like depression and schizophrenia but I suppose it's much more cost-effective not to do one on every patient when a psychometric test can be used with a decent degree of accuracy that's increased over time. Still, though, this psychiatrist gave a good TED talk on that very issue and notes that they are the only doctors that don't routinely directly evaluate the organ that's malfunctioning. Apparently there's also a degree of hostility between psychologists, psychiatrists, and neurologists over who gets to do what.
In line with this stuff + that vid, I've also known a few therapists and doctors to be largely against giving professional diagnoses, precisely because it creates this vibe of I-can't-change and pity-me toxic shit. They'll do it for insurance purposes/prescription/disability services issues, but other than that, they don't give a shit.
OP's comment about reading a couple webMD pages is pretty on point too, I think. On top of that, personality disorder dx by a professional is a last-ditch nothing-else-fits response after medical screenings/bloodwork/depression+anxiety treatment/etc.
Most (serious, non-tumblr) self-dx resources advise weeks to months of serious researching, elimination of other possibilities, requesting longtime friends/family members/loved ones for their opinions, etc. Even then, self-dx should be used to find better resources for yourself (e.g. lots of DBT-related resources online, useful for someone with Borderline PD), not to use it for oppression points and hide behind your need for 'community support' and 'finding people who understand me' and excusing shitty behavior.
EDIT: grammatical correction