Since our child was exposed to a large variety of vegetables and fruits at a young age, she has always enjoyed consuming them in myriad ways. When children's exposure to fruits and veggies has been limited, however, they don't always like consuming things that are so different from what they've grown accustomed to eating (and this many times carries into adulthood).
It's vital that children be exposed to a variety of foods, as often as possible, while growing up. For the vast majority of children, however, that has not been the case. Packaged, processed, and fast foods are a standard part of our society; we don't think twice about serving such foods to our children. Everyone is doing it, it's affordable and convenient, and they like it!