“By embracing a gender role opposite your assigned sex, you are reifying gender/privilege and thus making it that much harder for us to smash gender. I know that sounds contradictory but, if you’d been a feminist for as long as I have, you’d understand.”
Forcing someone to remain in the gender role that matches their assigned sex is just as bad. As is claiming that people won’t ever want to change their bodies for their own reasons. Plus, plenty of trans people don’t even want to reinforce gender binary roles, but they have no choice in order to survive as their trans gender in a culture which hates them. They’re as much against prescribed gender roles as you are, and are happy to buck the system along with you.
I’m willing to strike a truce with any of the radical feminists who come at me with this objection to my gender: you stop trying to force me into your gender roles, and I won’t force you into any of mine. Peace!