This overwhelming dominance by male-bodied athletes over female-bodied athletes is not the result of culture, resources, training or gender identity. Rather, it is the result of having male gonadal sex, specifically testes and bioavailable testosterone in the male rather than the female range. Even non-elite male-bodied athletes, including boys, can and do routinely surpass the very best female athletes. When we compare the latter two groups—the best elite females against non-elite boys and men—the performance gap is small but collectively determinative. . . .
[B}iologically male athletes—however they identify—don’t have to be elite to surpass even the very best biologically female athletes. And it doesn’t take a sea of them to obliterate the females’ competitive chances at every level of competition. If only a very small sub-set turn out to identify as women, we will be overwhelmed.