I worry that wanting to change from girl to boy or vice versa is becoming more of a fashionable choice than one that they actually feel.
I don't doubt that there are some people who feel they were born in the wrong body, but I also don't believe that any decisions or actions should be taken until adulthood (obviously it's fine to wear what you like, and do what you like, but no hormones or other medical intervention until you're an adult.)
I have a friend whose daughter has just announced that she's trans, and I just think it's rubbish. She's looking for attention, and my god, she's getting it. She never showed any signs of this as a child and was always a 'girly girl', with clothes, makeup, dolls, not liking getting dirty - the whole stereotype of a girl really. She was a very happy little girl. AFAIK 'wanting to be a boy' doesn't just happen overnight, but it seems she's seen a subculture on social media that she thinks it'd be cool to be a part of.
There's a difference between tolerance and turning it into something that teens aspire to.
I worry that people will make life changing decisions that they will live to regret.