I don't really agree. if I look at the label on a box of poptarts, I can see the number of calories in a serving and the ratio of carbs, fat, and protein. from this I can conclude that it is a relatively unhealthy food, but I have no idea how to interpret the breakdown of exactly what types of fat they contain. are polyunsaturated fats bad? what about monounsaturated? the nutrition facts are right there on the box, but I don't really know what they mean without doing a bunch of research.
the actual ingredients list is worse. there are at least ten ingredients in poptarts that I just don't recognize. I can clearly tell that they are not an "all natural" food, but not much else. if I had a food allergy or wanted to avoid a specific additive for whatever reason, it would certainly be useful, but otherwise not so much.