I just said this in another post. But most people, including on the left, have reservations about biological males in women's sports. And it is not an issue that isn't "statistically relevant," but even offering that as a reason why it is okay means it is only okay because just a few women and girls are impacted.

And the issue isn't even thought through. It makes as much sense to divide sports by gender identity as it would by dividing sports by sexual orientation. What do either of these "internal states" have to do with sports performance?