You rarely hear an ex junkie try to blame it all on the dealer or the war on drugs.
Instead, they take responsibility: “I had heard the stories, I thought it wouldn’t happen to me, I was a dumbass.”
This is a really interesting observation.
Many people who find themselves severely addicted to hard drugs probably aren't even capable of rationalizing it the way you describe. The intriguing part, in my opinion, is why this is so.
One doesn't usually start using hard drugs because life is amazing. Regardless of whether you believe in the disease model of addiction, to some extent or another, there's an underlying psychological component. Broken brains can convince us that all kinds of objectively stupid ideas actually make perfect sense. There are people who are so psychologically unwell that they don't have a normal instinct for self-preservation. Perhaps less "I didn't think it would happen to me" and more "I knew it would probably happen to me and I didn't give a shit". Some of them may realize way too late that they do, in fact, give a shit, but by then, they're so entrenched in drug use that they cannot extricate themselves.
I think troons are the same way. Most of them have serious mental health issues way before they decide they're experiencing "gender dysphoria". Nobody in a good place thinks, "Hey, my life is so awesome, but I bet it would be even MORE awesome if I got my tits chopped off, paid someone to shred my vagina and sew it shut, and then had a fleshroll harvested from my arm to be surgically attached to my abdomen! Not just a little one, an ENORMOUS one, and definitely abdomen, not pelvis!"
A lot of them end up so far down the pipeline of irreversible surgical interventions that they can't fathom any other option. The horrific and frankly inexcusable complications which appear to be an expected outcome of these surgeries completely destroy any possibility that the patient will ever be able to live normally. There's no way out, so may as well continue to seek surgical "fixes" that inevitably make things worse. Even when an addict has lost everything to their habit, they continue to use because paradoxically, it's the only source of comfort they have. They even refer to getting high as a "fix".
Additionally, the bizarrely sectarian, pseudoecclesiastical nature of the transgender community itself makes it really difficult for an individual to admit regret. Drug addicts don't generally have a bunch of other addicts accusing them of being complicit in LITERAL GENOCIDE if they decide to stop shooting up. In fact, my own observation has been that other addicts are pretty supportive of anyone among them who is making an earnest effort to get clean. Even a dealer is likely to understand a customer who decides to quit buying.