Same reason they piggy back on the civil rights movements for black people, or worst compare themselves to the actual dehumanization of black women (specifically during slavery) or handmaidens, instead of standing on their own two feet they know that they have no real arguments, they're men trying to weed their way into women only spaces to validate themselves that's pretty much the only rights they're fighting for and it doesn't look good on paper, seriously I haven't seen 1 legitimate reason to support there cause you don't need female/women only spaces to feel human create your own spaces. Transwomen are the only group of people who've publicly said "I used to look at my naked sisters body without her knowledge" and received no backlash the only group of celebrities who went public about supporting child rapist into women's prison with or without their penis and still have their careers in tact, why would women any woman want this type of mindset in our spaces that's exactly what we've been trying to avoid.

I rarely see transmen demanding men accept them as men or they're denying their human rights narcissism is more common in men than women so not a big surprise, it's easy to bully women into doing what you want when was the last time you saw transwomen demanding we make prostate cancer gender neutral? Nope they rather women make space for prostate cancer when cervical cancer, ovarian cyst, and actual female issues continue to go ignored do they care they're taking up much needed space and resources? I doubt it because they can't handle they're not women so they force society to play along at all cost, the part that bothers me they acknowledge the inbalance between men's and women's health but pretend there's nothing that can be done about it because they are women. I wish popular feminist/humanist groups would at least make the clear distinction between "gender" and sex if they're going to keep forcing this on us.