This is just twerp behavior, but like you can't pretend that you're arguing in good faith when you "break down" the term "women's spaces" into a cluster of situations that doesn't even include the focus of the complaint. All of the examples are either exemptions or excuses.
The only time "female-only" spaces are even acknowledged, it's in defense of grandfathering in trans men who joined these spaces before they came out. As though this is the only or even most common way this happens! Like they're getting kicked out!
No one, certainly no trans person, is arguing that trans men can't go to Planned Parenthood. It's honestly offensive to invoke a strawman on that level.
This is about trans men who participate in, seek out, and even organize spaces that implicitly or explicitly define "woman" to exclude trans women.
It's about looking the other way when a "women-only space" is hostile to trans women and actively supportive of trans men.
It's about minimizing transmisogyny out of self-interest, so much so that you tie yourself in knots trying to pretend that inclusion in "women's spaces" isn't really a privilege, because after all they still misgender you.
(This is arguable; the double standard can absolutely extend to welcoming trans men as trans men and still excluding trans women. See also recognizing nonbinary people unless they are AMAB.)
It's about promoting transmisogyny by using "AFAB" (and its lexical antecedent "female") to define a class and affinity group that connects trans men and not trans women to cis women.
And it's about defining trans men as passive victims in all of this, even when your "unpacked" set of case studies all but positions them as founding members of these trans-woman-exclusionary "women's spaces!"
Which is it, really? Are trans men so entwined with these "women's spaces" that they can't be expected to find other hangouts since they are not women, or is it not partly on them that these "women's spaces" are cesspits of transmisogyny? Are they marginalized by the obvious transphobic implications of defining trans men as women or lesbians or "female?" Or is the real harm the part where trans women problematize this longstanding elision?
Like you cannot argue these things simultaneously: Including trans men in "women's spaces" is affirmation and erasure. Access to women's spaces is crucial to trans men but should not be regarded as any sort of advantage for trans men. Trans men who choose to attend events defined as "female-only" are not limiting womanhood in a way that erases the lived experience of trans people, but trans women who think trans men should not include themselves in any space labeled "female-only" are.