As with the ethics of (non)disclosure concerning one’s gender history, athletics is one area of trans rights where otherwise sympathetic voices routinely fly off the rails. I have noticed two areas in which this manifests: Ignorance on how hormones actually work; and conflation of statistical averages with the specific outcome of a given individual.
Fallon Fox is a mixed-martial arts fighter who was invited to speak at Skepticon back in 2015. She is also a transgender woman. Fox has been subject to a great deal of scientifically illiterate criticism following Fox’s victory during a match between her and another fighter who was assigned female at birth. The substance of the criticism was that Fox had fundamentally violated the conditions on which they agreed to fight by “being male,” despite having lower testosterone than her opponent and despite having a similar body frame. Out came the weird pseudoscience.