Here is a post explaining gender diversity in humans. To many today do not believe in science so will never accept anything but their own beliefs.

huffpost.com/entry/biologists-…

Biologists Rip Trump’s 'Non-Sensical' Executive Order Declaring Only 2 Sexes

“Clearly, this order is not fully informed by current biological science,” said Dr. Richard Bribiescas, president of the Human Biology Association.

^{Jennifer Bendery (HuffPost)}