I had been moved by this story: a female athlete had been banned from competition because her testosterone levels were naturally high, citing an "unfair biological advantage".
But competitive sport is mostly about biological advantage. All professional athletes have the same time in a day to train and practice, so biological differences are a big part of the differentiation between competitors.
So the subtext of this decision clearly was sexist as she wasn't deemed female enough by the sport authorities to compete with fellow women. If anything, this event should remind everyone that competition is never fair, that nature doesn't care about simplistic categories, and that women have always been deemed inferior to men in sports, regardless of their performance.