I never had an avocado until I was in my mid-twenties.  Now I love them and I can luckily afford to eat as many as I want, but I wasn't malnurished growing up because we didn't have them.  I have no idea where it came from but there's this insane idea that if something isn't perfect (nutrition, cultural representation, economic position, etc) it's the same as not having it at all.  People act like it's all or nothing.