Purchasing foodstuffs at a local gas station or convenience store will easily provide enough calories to get through the day.  And you won't have to spend much, and you can feel satiated by eating in the car on the way home.  No cooking needed, no table setup, etc. and one can get to the kids' soccer game on time.

Under this scenario, we seem to emphasize food quantity, convenience and speed over quality and the idea that eating is (can be) a social experience.  

Perhaps if we put more of a priority on food quality and the social aspects of food prep and eating, we'd be a little better off.  It's definitely more effort, but is it worth it?