Link: "Nonbinary Runners Have Been Here the Whole Time"
The piece is impossible to parody, but in a way, the absurdity is—clarifying. I always want to ask trans-inclusion-in-sports people what they think the point of sex-segregation in sports is (as opposed to just having everyone in the same category): if they admit that it's a pragmatic policy to give women a domain to compete in despite the sport-relevant trait distributions of females and males being different, then that at least opens up the empirical debate on whether hormone replacement therapy gets "close enough" for trans women to relevantly count as women.
But with the nonbinary category, there is no empirical issue to get confused with! It's pure identity narcissism—or, in more detail, it's a pure instance of the way in which sex-related high-dimensional trait clusters get reified into social categories, resulting in some people learning a desire to escape their reified social category even in situations where sex actually is the decision-relevant trait, resulting in other people who are frustrated by being socially punished for pointing out that sex is sometimes a decision-relevant trait disparagingly accusing those people of "identity narcissism".