I don't see that as the issue in the (part of the) conversation (that I have read), though I can imagine it may have carried over from elsewhere, which is why I take it as projection of prejudices

paralympics have tons of different categories for similar sports, depending on characteristics of the individuals, and that's fine. the bug IMHO is trying to fit people into rigid binary standards. nature, and humans in particular, don't fit these rigid standards, and that's ok. but imposing such rigidity is harmful to victims of transphobes and of those who misread the understanding of the nonbinary nature of gender as transphobia

when I was in kindergarden, we had judo and ballet. judo for boys, ballet for girls. (that was the 1970's in Brazil, don't get me started). I have been fat most of my life. when there were judo competitions, that means I was always assigned to play against kids that were much older, stronger, and more experienced than I was, just because I was in the same weight range. that wasn't fair. the categories weren't well designed for kids.

why, instead of rigid binary-gendered categories, shouldn't there be more categories that made room for all richness of human diversity to be able to compete fairly with their equals?