This is something I know little about and want to be better informed on by anyone willing. Web searches don't pull up much and I'm hesitant to ask people in my IRL community.

So most kids don't regret it right? But it seems so iffy to let developing people make decisions like that. I had a three year phase from around 13-16 where I desperately wanted to remove my nose. Completely. (It's an ugly nose and I was an especially dumb kid). I think I would have done it/had it done if it were easier. And less painful. And maybe I'd still be chill with it if I had but man was I a strange kid. But I'm kind of glad there wasn't a good way to do it. Is this a false equivalency? And why? What age should they be allowed to begin HRT? What impacts does it have if reversed? Should kids also be allowed stuff like tattoos and alcohol? I don't like the argument that you can give kids amphetamines or make other life changing decisions for them as I'm pretty against the system that allows it and so I don't think if that's the justification I'm on board on that basis necessarily. I'm genuinely asking as I usually don't engage on this topic because it can get spicy. I'm open to opinions from anyone with one.

Even career choices are altering people's lives. Even if I have my guitar, sometimes I regret putting so much time, energy, and money into it, partly because of a very depressive period in my life, partly because some potential medical conditions I have make bending strings upwards on the fretboard extremely painful as it feels like my nail wants to separate from my skin, partly because my taste in music shifted a lot away from metal music. I wish I was spending that on art or something else, IDK. Still I don't want to introduce a bill that would forbid people learning the guitar before the age of 25.

I get the point, but it's not a good way of defending it. The ADHD medication might be okay, but here is framed as an exaggeration, and the other one is not good.

Furthermore, many of those interventions are detrimental or at least dangerous. Mine was orthodontics and it ended terribly; today, I would need a surgery to correct all the damage caused. While I was a difficult case, it's not uncommon. In recent years, braces are being reconsidered as they alter a developing skull, often atrophiating something while repairing something else. Sports in childhood can have an impact in adulthood. This one I'm also living it closely as my mother was one of those girls inspired by Nadia Comăneci to start gymnastics. Today, she's living a hard late adulthood.

We've normalized not listening to children and thinking of them as our properties. Medical interventions (I literally pointed out the problem with my treatment and I was ignored) or the lack of them can be a sign of this. We need to balance their developing cognitive abilities with their autonomy, not shadowing their autonomy all together. That's the argument. Telling people "things are already done, so what's the problem?" is fallacious at best and counterproductive at worst.