Well, the negative consequence on the value of willpower is pretty obvious. "In what measure" is the real question.
Right, and the associated cultural impact of increasing hedonism
You know the way that software bloat expands to consume increased computational speed?
We're about to see the nutritional equivalent.
You have the completely wrong take on this. Dieting destroys your relationship with food. Basically every adult woman exhibits some level of disordered eating because of it— "girl dinner" is both funny because it's true and sad.
Being able to lose weight while continuing to eat is a wonderful thing. There is no virtue in spending your willpower making your body do something it desperately doesn't want to do. That's some puritan shit.