Originally a comment by tigger_the_wing on Hormones do not negate.

If hormone levels are going to be used as a way of dividing people into sporting classes, then current levels aren’t accurate enough; lifetime levels must be taken into account.

Oh, look! We already do that! Men, and women who have ever been doped with steroids like testosterone, have already been barred from women’s sport! See? We don’t need to ask intrusive questions about someone’s self-described ‘gender’! We can simply continue to exclude men and take blood and urine samples to ensure fairness!

I find it astonishing that people are tying themselves in knots to avoid admitting that humans come in two sexes, which need to be separate in sports if there’s to be any form of fairness; and yet still keep coming back to that fact via increasingly convoluted routes.

And, as you rightly point out, ‘fairness’ isn’t what the cheating men would ever accept anyway. Never mind winning, that’s just the cherry on the cake. Their dominance of women, and the women’s capitulation, is the point of their invasion. Hence the punishment of women and girls who refuse to compete against them. Getting a win without humiliating women and girls is like being told that they can have a cherry, but no cake.