I would have to agree with you. Let kids be kids no matter how they feel about their own gender. Let their brains develop to adult brains and then they can make the best judgement for themselves as to how they want to live their lives.

I understand it might be confusing feeling "trapped" in the wrong body as a kid but I don't see any downside to waiting to perform any sort of surgery or reassignment procedures.
That is just my opinion as a father.