"Mouncey played men's handball for Australia before starting her gender transition."
So you now have an National grade male athlete who has transitioned. The player still carries all the advantages of increased bone density, size, strength, and speed despite transitioning.
The whole point of women's sports is that women are physically disadvantaged compared to men. To allow a hormonally and/or surgically enhanced athlete to play is no different from allowing a drug cheat to play. It is entirely unfair to natural women and destroys the whole point of a women's league.
