Thanksgiving dinner for me was turkey with a little gravy, a few green beans, salad, and that was pretty much it. No willpower involved. It was what I wanted. No stuffing. No pumpkin pie. Oh, and wow, I used to have an eating disorder.
How did I achieve this ability to always eat what is good for me? Exclusively? An exclusivity that applies even to THANKSGIVING?
The best explanation I know is I was possessed by an alien or something. It makes no sense. But it's not willpower. Nor is it a reserve of ability to control myself. That is a function of negativity. This is just a matter of doing the right thing. Even to the exclusion of things like "feelings of entitlement" or "a need to eat healthy". Like what you are saying.