Exactly. And what most people tend to think is "healthy" is not based on sound science of any kind. These questions you ask are important because one can't ta

Exactly. And what most people tend to think is "healthy" is not based on sound science of any kind. These questions you ask are important because one can't take something like diet and exercise and treat them in a reductive sense. One can lose weight by eating nothing but plant leaves. Is that "good" food or a "good" diet? Such a diet would be unsustainable in the long run simply because said food is neither dense enough in energy nor dense enough in nutrients. That doesn't sound particularly good to me. But many people equate salad to being "healthy", such that they will add lettuce to the things they actually want to eat because of a mystical believe that plant material is inherently good.