Kind of a contradiction in that trans women aren't female bit lol. Very much depends on how you define that and how you measure it.
The categories are also not called female categories, they're called women's categories, which is effectively the same thing in this conversation. Female is a loose category encompassing people with many typed of bodies and many hormonal levels and many degrees of feminization and masculinization. This is effectively excluding one group of women specifically and ignoring all other groups that have advantages.