I haven't made any broad assumptions. You can buy healthy food like frozen vegetables, raw chicken, ground beef, potatoes, beans, rice, apples, olive oil, plain yogurt, etc pretty much anywhere. I travel a lot and have seen these foods widely available in neighborhoods that are not remotely ritzy or trendy. They are usually inexpensive, and if you have a little storage space then you can stock up when stores have discounts to save even more.

There are a small fraction of people who do live in food deserts and we ought to help them out. Probably the best thing we could do to make many food deserts "bloom" would be to fund the police and strictly enforce shoplifting laws, especially against organized retail theft gangs. Good grocery stores have been driven out of some neighborhoods partly by high shrinkage rates (not the only problem but a major contributing factor).