No one is transgender. They are deluding themselves into thinking that. Changing one’s sex is impossible.
The girls are right to sue.
There are boys’ teams and girls’ teams for a reason: boys, on average, are stronger than girls. A proven fact.
The choice is between two possibilities:
1. Do away with separate teams, starting points, different rules for the two sexes. Both sexes on the same team. Delusional individuals who think they’ve changed sex play on the same team as both men and women.
2. Keep separate teams for males and females, and determine a person’s sex by genetic testing. Delusional “transgender” individuals play on the team corresponding to their genetics.
Choose one.
There is another possible choice, not that I am an advocate of it, but I have heard it. Allowing transgender girls to compete against normal girls, but ONLY if they "converted" before puberty. I imagine that would probably eliminate a lot of these types of situations.