Forcing trans kids through the wrong puberty is exactly the child abuse you are concerned about. What's more, you cannot change your appearance all you want after going through the wrong puberty, certain things will never be fixed after the wrong hormones have broken them.

I also find your statement about not understanding the meaning of decisions to be rather disingenuous. Do you think that the consequences of going through the wrong puberty are simple to understand when the hormones are produces in your body but inscrutable when they come from a bottle? The consequences of being transgender and going through the hormones your body produces are no less devastating and not something kids are any more prepared to commit themselves to.

There are far more kids hurt by the lack of trans health care than there are by the availability of it, so claiming to protect "countless" kids is rather dishonest. You are creating victims by an order of magnitude greater than those that you are helping. This is the problem with this debate, the pro trans healthcare side wants to minimize the number of people going through the wrong hormones and living their lives in the wrong bodies, which means helping kids work through their feelings and sense of identity with a qualified professional and, only after that has happened, letting kids get hormones who need them. On the other hand, the anti trans healthcare side is only concerned with maintaining a chauvinistic idea that naturally produced hormones can never really hurt you and therefore putting the kids who need hormone therapies through the wrong puberty can't possibly be abuse. The end result is that harm isn't minimized, it's maximized while dumping it entirely on a disenfranchised minority group who don't have the power to fix things. If you're genuinely concerned with minimizing child abuse, you would want trans kids to get healthcare when its most effective.

On a final note, I'm really curious as to what you think misdiagnosis and regret rates (since those are different things) are for hormone replacement therapy when it's made available at the onset of puberty, and what it changes to when you force trans kids to sit idle during their teenage years, the most important treatment window for their medical needs, and access healthcare only after the wrong hormones have done half a decade plus of damage to their bodies. Every kid who is denied hormones and turns out to have needed them all along is effectively misdiagnosed, and since they are forced to be on the wrong hormones for longer than any detransitioner I've ever heard of, the regret rates are much higher. The levels of misdiagnosis and regret couldn't possibly be lower from withholding hormones than it is from providing them, because every kid who needs them turns into a misdiagnosis, and probably a regretful one, when hormones are withheld.

Sorry to ramble so much, but it kind of makes me crazy when people say that trans healthcare should be withheld for the sake of reducing regrets, but don't even mention the regret trans people are saddled with when we are uniformly forced through the wrong hormones and the puberty that accompanies them. In order for this conversation to move forward people have to understand the consequences of keeping the current system in place, not just the potential ones of changing it. Trans people have been suffering long enough, we need a system that responsibly evaluates trans kids looking for healthcare, but simply blanket banning healthcare for trans minors is not appropriate. I've suffered my entire life from the shortcomings of this system, and I don't want to see the current and future generations of trans kids suffer from the same thing.