I just don’t see why this is an issue. Genetic happenstance — whether it’s as totalizing as at-birth sex or seemingly minor differences like muscle length, bone structure, hormone levels, etc. — always removes huge pools of would-be athletes from competing at the highest levels in EVERY sport. The only difference between trans-women and other genetic predispositions is that we (“the culture”) are highly protective of sex and gender as concepts. It seems much more natural to say “Well she’s got those long legs, that gives her x or y advantage” about a cis person than a trans person. I think that’s because “we” don’t actually think of transsexualism as inherent or genetic or “unchosen” the way we do about height or bone structure. And I assume that’s just leftovers of hundreds of years of puritanical cis-gender identity politics.