Personally I think we should be giving kids a lot more support in not transitioning. And by transitioning, I mean transitioning from a girl to a woman or from a boy to a man. If the child isn't 100% certain they want to go through with massive irreversible hormonal changes, they shouldn't.
I think you're underestimating the care and caution with which these decisions are approached. No one is rushing kids into transitioning. No one is imposing it on young people who are not sure. There are many safeguards to make sure transitioning only happens where it's appropriate and the person fully understands and agrees to it.