yo? Artificial puberty is a luxury. Artificial puberty can also be healthcare for some people, but again, healthcare is a luxury, and is not guaranteed.
People will always know themselves better than others do.
Sometimes yes? I bet some people think themselves to be "stable geniuses" when they're clearly deluded creeps. I'm also reminded of The Yellow Wallpaper, Available to read here which depicts the internal struggle of a woman with her worsening mental illness. Her autonomy is stripped not only as married woman in the 1800's, but as an ill person who is literally assumed to be incapable of making her own decisions. It is not only horrifying but phenomenologically significant, and socially relevant, I recommend this short story by Charlotte Perkins Gilman.
We have the ability to sit every person down before puberty and talk them through what it entails, and then let them choose what exactly they want to go through.
I'm not sure this is true. We might be able to do this for first-world children whose parents have jobs and insurance.
I think it's wonderful that you're expressing yourself and trying to make a better world.