This was my response:
I think it's great to have as many people as possible participating in sports, regardless of their gender identity. However, I have real concerns around trans women playing as women in female-only teams.
Trans women are biological males with all of the differentiation in physical strength that that brings. In my daughters rugby club, girls and boys are MADE to play in sex segregated teams once they reach high school specifically because of safety concerns.
A man or boy saying that they feel like a woman or girl does not make this real and important issue go away.
And for sports where girls and women are competing against other biological females, it is a clear advantage to be a biological male with the testosterone and muscle strength that comes with XY chromosomes. Women and his will lose against trans women and girls, because of biology. Feelings and identity won't make any difference.
Mixing the sexes like this in competitive sport will only serve to turn girls and women off sport.
Trans girls and women should play in the team and sport that corresponds to their biological sex. And boys and men should be educated to be OK with this, regardless of how their trans fellow athletes dress, behave and identify.
Women and girls should not be thrown under the bus to increase trans participation.