I'd like to start by apologising for the tone of the post to which you responded with this. I was rude, dismissive and angry. Didn't help that I was tired, drunk and angry about ... some other things too. But those were just factors. At the centre of it all was me being a gobshite.
My point is that living through my own mental health problems taught me that there are few, if any, authorities on what it feels like to live through something. Too many times for my liking I was told by people with no clinical or lived experience what my condition was like, what the problems was, what I needed to do, and also how it fit into some kind of world view that was being pushed on us all by [doctors, the government, the PC brigade, "slackers"]. In every single case, pretty much without exception, they were completely wrong. Anyone can have an opinion on anything. That doesn't mean every opinion should be weighted evenly, or that it's "typical SJW" folly to suggest this to be the case.
I have no idea what it's like to be trans, other than perhaps in a small way what it's like to experience the above. The qualitative outcomes of a treatment can only fully be judged by including the experience of the person going through it. Quantitative analysis can tell you some things, but without rigorous peer review, and especially in the hands of partisan ideologues, can lead to self reinforcing mantras.
Certain types of treatment can be, but aren't always, successful. The job of physicians and healthcare in general is to ensure the right people get the right treatment, and that those chasing it with unrealistic or unhealthy expectations should be dissuaded. Ideologically driven warriors on any and all sides using people as pawns, scapegoats, or sacrifices to their visions of the "greater tribal good" should stay the fuck away from healthcare, science, games and everything else. Though ... I'm sure they won't.