What a load of tosh!
Think of Usain Bolt, the fastest human in the world. Yet he isn’t the fastest at every race. When asked why he never runs the 800m, he responded: “I’ve tried it and trained and my PR (personal record) is like 2:07, and that’s really slow, like, a woman could beat me.” The interviewer laughed him off, saying: “You’re going to get in trouble for that!” But Bolt was serious: “It’s true, though – they could!”
Just because Usain Bolt is currently the fastest man in the world, why is it offered as a gotcha because he could've beaten by a woman? Like anybody else, he plays to his strengths. If a woman beat Usain over a 48 hour endurance race, would this call into question his or the woman's sex? No. So why is this offered up as a valid argument?