Given that racists and slavers used the “natural physical strength” of black people to justify putting them on hard labor and some medics still think that blacks has higher resistance to pain, I wonder if when black athletes started to join mixed race sport teams, some racist would have used the same “biological advantage” argument that now transphobes use against trans athletes to claim it was “unfair” for black to compete against whites to justify segregation.
Even if that were true, I don’t think 100% of sporting organizations require 2+ years of hormone treatment before they allow trans athletes to compete.
If it were true, though, it would be a good way to solve the problem of competition.