I really don't understand why. She had seem pretty open minded about other social issues and the harry potter books preached equality no matter what you're born as "muggles" "Squibs" or half blood or full blood Then there's the house elf's as slaves and freeing them and such. There's a lot of lessons on that front in those books. I was a major Harry Potter addict but tbh I don't agree with her views on transgender .