I agree ~~ wrote:
People who aren't women have no business competing in women's events.
Let's get the Y chromosome high testosterone non women out of the women's events.
Chromosomes and hormones are crazy complicated; Semenya almost certainly does not have a Y chromosome, but still has unusually high testosterone. Some women (women born with vaginas, not transgender) with very low testosterone actually do have a Y chromosome that was effectively never activated because their bodies can't process testosterone correctly. Women can have XXX chromosomes. There's loads of chromosomal and hormonal abnormalities out there. And if we're gonna say "no Y chromosomes," that means we have to actually test everyone's chromosomes, which is a huge pain. And then when the results come back, we'll still have no basis for banning Semenya or probably anyone else with a potential advantage, because their advantage isn't chromosomal.
If we want to truly level the playing field by banning athletes like Semenya, we'd have to set specific testosterone thresholds. And it's really hard to decide where that threshold should be, because women fast enough to make the Olympics already tend to have slightly higher T than average. As nice as it is to be able to say "women shouldn't compete against non-women," it's not that simple. Sex is not as neat and binary as we'd like it be.