People aren't quite sure what it means when a book is a Booker Prize winner. They're not quite sure what is being recommended, what literary values it stands for, because every year it stands for something different.
I feel like if I'm going to give you a book about my dad, then I really want to give you my dad, because he is interesting and he is funny and if you're buying a book about him, I don't want you to have to sit through stuff that's not him.