I've met plenty of people who say "I only read non-fiction" always as if it's a virtue. A friend's father told her she made up lies about people who didn't exist. That was his opinion of her fiction. I think some people are really threatened by fiction, and it's unfathomable to me. Perhaps they're threatened because they've been told to like something that's not for them. It can be difficult to not like something when it's implied that not liking it is your own flaw. I feel these people live in a poorer world for closing that out of their lives.