[user104658]

It's a simple and undeniable fact that more (far more) than half of teens who experiment with gender norms and roles as part of figuring out their adult identity (which, genuinely, I don't think there's anything wrong with as a standalone concept) will ultimately revert to their natal sex when they realise that it doesn't mean having to stick to historically defined gender roles. We legitimately know this from years of study. Most teens who experiment don't go on to transition.

Thus, allowing the transition process to begin in the teens is flat-out unethical.

In fact the very idea of even suggesting to kids and teenagers that they should have any real idea of who they are while they're still developing both physically and intellectually is abhorrent to me and it's becoming an increasing problem. No one should identify or be identified as anything other than "a kid figuring life out" until 21, bare minimum, more realistically 25.