She is a free person so she have all right to talk about this and any subject. And also she is free to not talk about something if she doesn't want (sure she can be challenged on not talking when it is a topic she usually talks about).
On the books I think she made a well done job on convey diversity on gender, race and sexual orientation. But she shouldn't give details outside the book, if it was relevant it should be inside the book. Outside the book the author shouldn't be talking about the book.
But we are also free to agree or disagree with her, but don't need to witchhunt or the like.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
Azzanation: "PS5 wouldn't sold out at launch without scalpers."