Trans women are women, not in a "gender is fake and you can do whatever you want" way but in a "women are a real sociolopolitical category that trans women are a part of" way.
it is precisely because cis women can secure their womanhood through existing biopolitical framings that they can challenge and claim such scrutiny as injury. the analogy itself requires the active degendering of trans women whose womanhood has always already been deprived