No one should disagree with your final sentence.

And I generally agree with the approach of leaving parents and their children to work out what's best with them. But I don't think it's crazy to be concerned about a growing trend in performing life-altering surgeries on minor children when there appears, as suggested in the article, to be scant research in the area and real concerns that it might not be the panacea some advocates suggest. And I think there's a legitimate state interest in protecting minor children from permanent harm, even if their parents are in favor (just as I can't take my 5 year old to go get a tattoo, even if I think it'd make him a happier kid).

Calling people by the name and pronouns they prefer (as I've consistently done with a transgender colleague), showing respect, discouraging and punishing bullying, make reasonable accommodations for bathroom/changing facilities, etc., all fine by me.