"Do you think it's fair to allow trans women in women's sports?"
Small picture answer:
Yes, I do and I don't give a fuck about your counter arguments.
Bigger picture answer:
I think the real problem is that somewhere along the line, sports was turned into a big business and a eugenicist endeavor that nations and states wrap their senses of supremacy and nationalism around, rather than leaving it as a hobbyist's pursuit where people just do sports for fun.
Now sports attracts assholes.