Here is my logic by anecdotes and observation -- All the factors matter, and obesity definitely has a social component. The jobs not only have a physical appe

Here is my logic by anecdotes and observation -- All the factors matter, and obesity definitely has a social component. The jobs not only have a physical appearance component, the performance expectations and constant competition may mean you need more endurance. I'm not fat, and I'm not ripped, but I sure as hell feel a major performance boost in my own work when I eating healthy and exercising daily vs when (years ago) I was sitting inside all day drinking soda. I can't imagine how I would feel or perform if I had kept that up post-30. Chain restaurants share commonality with big box retail. In a major city taking a client to Applebees much less Mcdonalds isn't going to cut it. In some cases rent may be too high to even support their business model, replaced instead by small shops and food trucks and larger restaurants at higher price points. If the car was less important, the parking lot didn't matter, and people walked, would everything collapse in to more centralized walking cores? If so, would they serve anything healthy, or are the big cities an outlier because of the wealth and performance pressure?