How many times have you had the following conversation? You’re trying to persuade someone to do something, and they say “No, I don’t like that”. You ask them how many times they have actually done that thing and they eventually admit they never have, but still maintain that they know they wouldn’t like it. That is the way that many of us behave when it comes to food, and especially healthy food.
The bare fact about eating healthily is that it involves expanding your range a little. Many of us will bellyache about trying a new food because we like what we are used to.