It's not just about winning races at school, though, is it? It's ultimately competing at all levels, up to and including the Olympics; representing your country; and, in the case of many American young women, it's potentially a scholarship to university which for someone from a disadvantaged background is huge and life changing.
When girls and young women start to miss out on these things because their place on the team has been taken by a biologically male person, or because they are competing in an event against a biologically male person against whom they have no chance of winning, no matter how talented or dedicated they are, will you still not feel an iota of sympathy or compassion for them?
Is there no part of your brain that says hang on, much as I empathise with anyone who's suffering, reality is still reality and a biological male CANNOT be a female?