@hatsune_kun the impression i get is that this stereotype developed when sff Fandom & the wider internet were VERY male dominant cultural spaces and so bl/transformative fandom being even like an even gender split would have been seen as “unusually feminine”
and then, like many gendered hobbies it kinda turned into a self fulfilling prophecy where men, esp cishet men were leery of doing something that was “for girls” so the space continued to skew towards women & queer folk who were comfortable w/that reputation
@hatsune_kun also incidentally worth noting that the fujo in fujoshi literally means “girl” in Japanese so if you are restrictive enough in your definition of fujos then tautologically all fujim are women
@hatsune_kun in practice i think the “male dominated” early internet had actually had many women taking advantage of its anonymity to stealth (as well as others who were out as such) while transformative fandom has definitely never been even close to an exclusively female space so I’m hesitant to make strong assertions about the actual makeup of those groups, but in terms of their respective cultural norms bl & transformative works have definitely produced many culturally feminine spaces