Maybe this is extreme, but I think you need it to be more explicit before you understand: A child can say to an adult, "yes you can have sex with me", but that is not consent because a child cannot consent.
Edit: I dont want to talk about intersex children. That's a red herring.
They're given a binary gender identity at birth, based on genital configuration. If their genitals aren't "standard" innie-or-outie, they are often encouraged to pick an option, and have surgical intervention and potential followup care to raise the child in the parents' "chosen" binary gender, purely because of what's in their pants.
Quelle surprise, this often becomes an issue when puberty comes around, and intersex kids find however they've been altered / raised to be, doesn't necessarily match up with themselves. It's VERY relevant.
The fact that you don't want to talk about them -- or seemingly trans men or non-binary trans people, since you're only focussing on trans women -- shows you're not being reasonable or intelligent about this.
Like all relationships, a discussion has boundaries. If the parties do not agree on the boundaries, the relationship cannot continue.
Unsure which "boundaries" you're talking about when it's a public forum and you're still making personal attacks and jibes where you can... if you're going to be dishonest, at least don't be hypocritical at the same time.
Why not, though? What makes that a red herring?
Because intersex children are not the subject of the discussion. Please see parent comment for context.
> 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.