Yep, NoSquirrels. RW's comment about the reason the author's note was left out of the book in the end was interesting ("because I didn’t want to kick off the book with a semi-apology").
It seems likely that it was also because the reviews and reception of the whole book would have got bogged down in picking holes in those thoughts on gender, pronouns, erasure and the rest of it. I think he gets it, and he also gets that he won't get the full wrath but the disappointed headshake, and why.