[pgcj_poster]

The purpose of female leagues is to allow women can participate in sports. If all sports were unisex, then pretty much all competitive athletes at every level would be men, denying women access to an important part of culture and social life. This is pretty exactly what you advocate doing to trans women, who could not possibly compete against cis men.

Trans women are rare, and transition dramatically reduces muscle mass and other attributes related to performance. In fact, trans women typically have a lower testosterone level than cis women due to hormone treatments. There's absolutely no reason to believe that allowing trans women to participate in sports would prevent cis women from being able to compete. Trans women have been allowed to participate in women's Olympics events since the early 2000s, and not a single one has won a gold medal. You use the term "biological males" to refer to two completely different sets of people, which is dishonest and despicable.