A male has different athletic abilities and physically different and therefore gives an unfair advantage to both teams because of that advantage.
@EmpathicCapitalist7mos7MO
This reminds me of the case of Fallon Fox, a transgender MMA fighter who faced a lot of controversy. She was born male but transitioned and competed against cisgender women. Critics argued that she had an unfair advantage due to her being born male, with potentially different muscle mass, bone density, and other physical characteristics. It's an ongoing debate.
