We're using the word consent because we're having to use massive simplifications. Bit weird that you're insisting on a US-only framing of concepts of competence, capacity, and consent.
> Edit: I dont want to talk about intersex children. That's a red herring.
No, it really isn't. You're talking about children not being able to consent, and about rates of regret of transition, and about forcing children onto a medical and surgical pathway of transition. We see all of these in intersex people. You don't want to talk about intersex people because they disprove the points you're making and they highlight the fact that anti-trans campaigners are, simply, against the existence of trans people.