I will be honest, I really don't give a shit about sports when it comes to this issue. I think we place too much societal emphasis on sports, especially when it comes to marginalized populations. I'm concerned about the safety and inclusion of trans folks on a larger societal scale and if sports must be sacrificed for that end, I'm cool with it.
But if we must talk about sports.
A better discussion is about the how and parameters of inclusion of transwomen in sports. Forget talk of "genetic males," "used to be a male," "chicks with dicks" etc. The question at hand is concerning competitive advantage*, testosterone level and whether a person has undergone male puberty (which opens a much more important and larger conversation about access to gender affirming care, but we'll put that aside for a moment).
It may be that Lia Thomas had a competitive advantage due to testosterone levels through the course of her life. But the conclusion shouldn't be "ban trans women from competitive sports" and villainizing her (she competed fairly by the rules as written). It also shouldn't be dredging up Juwanna Man as an fear-mongering argument against transwomen participation. There is a discussion to be had as to how long a person who has undergone male/female puberty should be on HRT before competing. There isn't a consensus among studies, but most identify that period as between 1-4 years where all competitive advantage from increased testosterone has been mitigated. Current NCAA guidelines suggest 1 year. As we have more trans women competing, it may show that that time period should be longer. Adjusting that requirement is about competitive advantage, not about the identity of trans women.
However, much of the rhetoric is not about finding a solution to competitive advantage, but that transwomen are "dishonest," "ego-driven," "men pretending to be women," etc. And that rhetoric is extremely harmful to the trans community.
*But the question at hand, and what's driving the conversation, ISN'T competitive advantage. That is the one foothold that people can grab to voice their opposition to transwomen being women and opening up medical rights and access. All of it is a bid against the normalization of trans folks - and mostly about finding a scapegoat that many don't consciously know or can't quite empathize with to maintain power.