If the only way you know how to prepare chicken is by deep frying it in oil, are you really making the healthiest choice? What good is an artichoke if you don't know how to cut it? If you don't know how to use a knife, what is the likelihood that you might get hurt?
Having access to healthy food is only half the battle. In order to reap the benefits, you have to know how to safely use the tools you need in order to prepare food in a healthy way. It's also important to remember that food isn't inherently good or bad, but that there are better choices and worse choices. That's why it's necessary to be able to read nutrition labels.