Diets are based on less

The whole concept of a diet is backwards, because in most cases, what society thinks of as a "diet" is based on the idea of less.

The idea of deprivation, ingrained in many diets, gives us control over a situation in the short term. It doesn't become a habit,  and 10 days — maybe two weeks — later, we see that deprivation rebound when self-control finally dwindles.