I think you give the static electricity that created that account too much credit. To leap form a semi-reasonable idea about categories and language, that as used by people reflects potentially unshared assumptions about definitions and unshared assumptions about how the world works along with limits on knowledge, to the idea that some words we use do not point to real and uniquely discernible things in the real word, or to the idea that there is no real word, is just babyish. These people must be spoon fed food and pretend some how that they endure. But this account we speak of takes it further by imposing their own fiction to replace what would be observable. Sex is real. Even plants have two and only two sexes, even self pollinating plants like corn. Let the non-binary people identify as a can of corn.