Who are you to decide whether it’s the right choice? You can’t make that choice for other people. You have no right to tell them what they can and can’t do, and they have to find out for themselves. And what you said about the puberty blockers goes both ways–if someone can’t go through the procedure on time, not only will they be left wondering their entire life, but they’ll also know that it was your fault for telling them they couldn’t. You don’t get to do that.