My take on the contention with trannies going into female sports is that it has very little to do with concerns about women "professional" athletes being dominated by biological males. Rather, it is mainly parents who just want their daughters to have enjoyable time competing in sports, and they see biological males ruining that enjoyment as they easily overtake any competition and make it a lopsided match, which is boring and no fun, especially for those who are on the losing end.
Most parents who watch their kids playing sports have a realistic understanding that their children are very unlikely to be competing at a professional level. They usually understand that a healthy competition builds character and gives them a good outlet to exercise and compete.
Having trannies come into female sports takes all that away, as it is well known that males are physically dominant in practically all sports.
If it makes parents mad then good
Until gender segregation occurs in the work force parents should pay the price of gender integration in the sports field
Unless they want to split into smaller countries each with a different gender policy
And women should train to be athletes to improve their health