How many times have you had the discussion that followed? You try to convince someone to do something, and they say, "No, that's not what I like." You ask them how many times they've actually done that stuff, and finally they say they've never done it, but they still maintain that they know they're not going to like it. When it comes to food, and particularly healthy food, that's the way many of us act.
The bare reality of healthy eating is that it requires a little expansion of your repertoire. Since we like what we are used to, many of us will have bellyaches about trying a new food.