There is more to male and female than just the sexual parts.. Male bodies are just bigger, faster and stronger with or without testosterone. That gives trans women a clear unfair advantage.
This is a collision of rights. I dont think one percent (or even less) of the population should outweigh the rights of 50 percent (all natural women.)
If you allow trans women to compete against natural women you are saying that the rights of a very small percentage matter more than the rights of half the population. The fact that these trans women are winning big should make it obvious the unfair advantage they have. Also that there is no trans — female to male — athletes wanting to compete against men should show you something.
Women have fought hard for the right to be taken seriously as athletes, and this is a real threat to that right.