Most of the posts I've read on the topic of Lia Thomas are not focused on on the fact that Lia is a biological male who identifies as a woman. The focus is on the fact that Lia shouldn't be able to compete against biological women because of the obvious physical advantage a biological male has. Even other trans women (ie, Caitlyn Jenner) have pointed out that it's wrong to allow biological males to compete with biological females - Don't you think an Olympic champion level biological male who now identifies as a woman would have highly relevant insight into the reality of this issue?
It's interesting you'd choose Renee Richards as an example that biological males competing with women is not a new issue (as if that makes it no big deal now). Since her playing days, Richards has reconsidered her position and agrees that being biologically male provided her with obvious advantages over her competitors, saying "I know if I'd had surgery at the age of 22, and then at 24 went on the tour, no genetic woman in the world would have been able to come close to me. And so I've reconsidered my opinion."
You've frequently stated that trans women competing with biological women isn't a big deal because it doesn't happen often. What if we start to see more and more of these cases pop up? Is there a point at which you'd agree this is wrong? What if Lia decides to stop sandbagging and goes all out, breaking a few women's world records (which Lia is clearly capable of doing based on her lifetime best swims)? Is it a big deal then, even if it is a low frequency cheat? Do we recognize those records as legitimate?
This isn't a question of old white males complaining (even though that is the popular thing to say these days), it's a very simple question of right and wrong... which is why people are unhappy that a large segment of our population is pretending that it's perfectly reasonable.