This comment is riddled with passive transphobia, in a tone that hopes you'll find it's neutral.

Biologists are in consensus that sex is anything but a binary, and that's even before intersex people are brought in to the discussion.

Then you went into "sex only places" and "sex only sports", completely dismissive of all evidence that shows that there is no issue (before you bring out your photos of Karen White and Katie Dolotowski, "no issue" means that trans inclusions has no effect on cis woman).

Your last line wants to assert that gender refers to gender roles, gender stereotypes or gender expression. It does not, and until you grasp that you will continue to be wrong.