HRT still leaves you with longer limbs and larger lungs which give a serious competitive edge. The numbers of trans individuals in sports doesn't matter, it's wrong on principle. Why segregate by sex at all? Let's get rid of it, you won't see any women, or any trans women, for that matter, anywhere on any serious athletic playing field. It'll all just be men.

What's the point of allowing trans women in women's sports anyway, especially at a top level? To affirm their identity? That throws an entire class of people, women, under the bus. Top performing males have an indisputable competitive advantage against top performing females in athletics.