Sure. But saying “biological sex isn’t a strict binary, and is dismissive of intersex people and those with sex-related chromosomal disorders” isn’t the same thing as saying “biological sex is a lie”.

In a the same sense that “the universe is majoratively hydrogen and helium” (which is true) isn’t the same thing as saying “the universe is either hydrogen or helium”.

By being overly reductive you’re making a true statement into a false statement.