Rowling has nowhere to go and nothing to do now that the Harry Potter series is over. After all her literary borrowing, she shot her wad and she's flailing about trying to come up with something to do that means anything.

Moreover, she is desperate for literary respectability. Even though she made more money than the queen or Oprah Winfrey in some years, she had to see her books pushed off the bestseller lists and consigned to a special "children's book" list. Litterateurs sneer at her work as a kind of subliterature, not really worth discussing.

It makes her insane. The money wasn't enough. She wants to be treated with respect.