Can’t pretend I’m particularly familiar with the specifics, but to be clear, I do think it is absolutely possible, and indeed likely, that there are situations where a genuine advantage is present, and I think the line really needs to be drawn by each individual sports body.

I understand the idealism of wanting there to be no real restrictions, but you need some regulations, if only to prevent the bad-faith asshole who decides to identify as a woman for the day of a competition. As time passes and more studies are done, we’ll be able to draw more evidence-based lines that more accurately balance accessibility and fairness.

My only real point here is just to say that this phrase “biological/scientific male” is way way messier than a simple binary category like that might suggest. A huge amount of tissues in the body of some level of sex differentiation, and that differentiation also varies a lot based on the stage of development that their exposed to hormones. A trans person isn’t going to change their skeleton with hormones, but there are other things that do meaningfully change to get closer to the other sex. A trans woman’s breasts, for instance, are genuinely just as “biologically female” as any cis woman’s.