That is very true slurpeez. It is just we also know that the book is not completely right. Like it said that Hansel and Gretel’s father abandoned them when we know that he was kidnapped by the Queen. That makes me think that the book is from someone’s perspective and we have only seen pages from the stories surrounding the Snow White and the Evil Queen story. There has also been a theory floating around that maybe Rumpel isn’t in the book since Henry can’t seem to figure out who he is and you would think it would be pretty obvious if Rumpel was in there who Gold is, but maybe not Henry is a kid.
Though you are completely right that none of that is proof. It is just a theory.