Probably because that's right around their (GOP/Christo facisim etc) level of commitment to extend their influence over others to control everything about them and their lives.

Every accusation is an admission and projection. They will cross nearly any and every line imaginable if it allows them to tell others what to do, or if it stops others telling them what to do.

That side of the political and social spectrum live in some kind of cult/1984 mindset that is capable of rejecting any evidence that is inconvenient, but are able to employ the same information/evidence when it's used to their favor. The information isn't ever actually important, the only thing that matters is control.

To get back to the actual article, Things do get tricky when you get into physical sports, age transitioning begins, puberty and physical builds etc, because there are huge physical differences between men and women. I'm not saying this as a blanket statement, but this article does feel like it's cherry picking institutions (Olympics). It also goes on to suggest testosterone may not be a factor, and sometimes can be worse for athletic performance. This may be true in highly specific sports that aren't focused entirely on strength, but there are examples of transgender women smashing women's records that this article completely ignores.

It's maybe less impactful at the absolute highest levels of competition where people dedicate their entire lives to performance for most sports, but the idea that everything is equal all the time in every instance between both genders is disingenuous and allows division to become entrenched.