Sex isn't "more fluid". It's entirely binary, but DSDs (differences of sexual development) can make appearances deceptive - so an XY male can be wrongly recorded as female at birth, especially in countries with inexperienced medics and midwives.

Phelps's records have all been broken. By other males, of course - no female is getting close to his numbers. That's male advantage in action.

Used to be that they'd ask in bad faith "what is a woman?" to trans advocates, but maybe it was a genuine question? Because they don't look like they could recognize one if they ever saw one.

i always find it very very interesting that trans men are always left out of these conversations...

As far as your other argument it seems to suggest doing away with the whole women's sports as separate.

Right, but that's not what's going on here, it's used as a platform for bigotry under the pretense of protecting women. It's not only... we need clear ground rules for this thing in order to have a level playing field, it's "Look what the trans are doing! Oh, the decadence in humanity!"

I'm not saying about doing away with woman's sports, sure, do the separation n xy chromozomes if we converge on this. I'm saying that it seems that the arguments of anit-trans activists are inconsistent and, for me, personally, a dude that doesn't really care about these things, off putting.