Fair enough.
As to #1...I end up the same place I end up with abortion: those decisions are between patients/doctors/parents. I'm staying out of their business if they're staying out of mine.
WRONG. You, nor the law, would stay out of it if these same Facebook Karens offered their kids alcohol. You, nor the law, would stay out of it if these same Facebook Karens got their child tattooed. Or branded. Or let them be prostitutes. Or let grown men/women (and yes, that's all there is) have sex with them (I have doubts anybody would do much in these days and times, with a pedo president and a push from entertainment/media, but they should). Or let them vote. Or let them join the military. Or let them drive a car. Or let them carry/provided them firearms.
Children who do not have the mental capacity to make these decisions should be protected from virtue-signalling, Facebook like craving, moron parents. - and apparently from people like you... by any. means. necessary.
As to #2, this is such an overblown problem as to be ridiculous. The trans athletes are outnumbered exponentially. The rare occurrence of this "competitive disadvantage" is hyped up redmeat for the base.
If you truly believe this, you are dumber than I ever imagined you could possibly be.
An average high school soccer team would dominate the women's Olympic team. That's proven. Whether there's one, or a million, the number does not matter.
There is an undeniable physical advantage.
It's like when you write code. You have to account for every eventuality even if its only going to happen once. The result of that eventuality coming to bear, breaks the system. So you take care if it in advance before it causes problems.
"Trans" whatevers are not what they are claiming they are. "Thinking" you are a woman does not make you a woman. Men - biological males - should not be allowed to compete against actual women.
I'm sorry science apparently baffles you. I thought we had to follow it....