If everyone in the U.S. consumed only enough calories to maintain a "healthy" weight...

I don’t think all foods are equally filling per calorie.

Feeling physically full is never my goal, and I’ve always been confused by people who say that, for instance, a broth soup is filling. Because I find little correlation between volume and saiety. But i think different people react to different cues.

I just ate an hour ago, and I had plenty of calories. And I’m lying here feeling hungry, somehow.

A good example is breakfast cereal.

I like Rice Krispies but they do nothing to fill my stomach. I’m hungry within an hour and need a snack to make it to lunch.

Shredded wheat fills my stomach and I’m ok for most of the morning. The fiber is a bonus.

My weight has been roughly the same for 15 years or so. About 40-50 pounds above optimal. My caloric intake must have matched my activity level output for that time for my weight to maintain. If I were instead the 40 lbs lighter optimal weight, would my caloric intake have really been all that much less? Does it take that many more calories for a larger body to maintain a stable weight?

Actually, the good ingredients require less preparation and less “stuff” to be palatable than the mediocre or bad ones: that’s precisely what makes them good. But you need to have access to them and you need to know how to treat them: many people have a problem with one or both of those.