I also don't have all the answers for trans sports. But the "fairness" thing does give me a chuckle.
When I played high school football, I played against Paul Kruger, Harvey Unga, Matt Reynolds, and Britain Covey's oldest brother. You could've sawed off one of Covey's legs and I probably still couldn't have caught him on a QB scramble. Kruger, Reynolds, and Unga? Could have choked the life out of me and probably 99 percent of my teammates if they had wanted. Technically, we were all young men (so I guess it was fair?) but to claim that it was actually fair would be laughable. This might be emasculating (but it's true, I'm old enough to admit it now) but the gap between a trans student playing sports is far smaller than the gap of me playing against those other male athletes. If fairness was the issue then I had no business being in the same stadium let alone the same field as those other male athletes. So this idea that "biological men" are going to dominate women's sports isn't valid to me and the debate of "mediocre biological male athletes" rushing to play women's sports doesn't seem realistic (although I'm open to hearing opposing views on this).
Anyway, I'm not saying that genuine concern over the integrity of women's sports isn't valid. But this concept of fairness is interesting. If fairness was the issue you'd have to adjust region sports in Utah to not only deal with school size but with athletic talent. How is it fair that Taylorsville who has won 5 games in 5 years and hasn't had a winning season since 2015 is in the same classification as Corner Canyon, who has had 2 undefeated seasons and has lost 3 games since 2017? Fairness? Wyoming's football team is in Div I along with Alabama's. Google tells me that Wyoming's football revenue was $13 million last year. Alabama's was nearly $200 million. Fairness? I guess they're all dudes, so it's like totally fair or something.
anyway, more of a critique than anything constructive.
At the end of the day, I'm still learning more about trans sports issues. My main concern is with the actual trans student. I don't envy any of these kids. I really feel for them. Not a single one has had an easy life and often they hate themselves more than anything else. They know and feel something is different about them. It's not a "choice" to go out and dominate sports. All I've ever known have merely wanted to blend in, have friends, feel loved. Often, that's just out of their grasp because being trans typically ostracizes them from religion, friends, family, and society.