PhilosophyMemes

The core idea she's presenting is wrong, (even in your interpretation) because biological sex is not binary. Computers are binary, biology rarely is.

There are biological males, biological females, and there are perfectly normal people who fit into 'biologically neither' (intersex people). Just because you have ovaries, does not make you female. Women typically have ovaries, but not always. Women typically have cells containing two X chromosomes, but not always. According to the current definition and overwhelming scientific consensus in the relevant fields, having neither of those things does not preclude you from being a female or a woman.

JKR seeks to rewrite terminology to exclude a significant swath of the population from the definition, not the other way around. From many, many statements and actions she's taken, her primary drive to do this seems to be hatred and bigotry.