It depends where you live. In the US, I've read about 'fresh food deserts' or some such name in many inner-city areas. Some convenience shops only sell processed food, or the produce available too is wilted and gross to be appetising, or too expensive to afford. It really is a matter of location. Availability issues are a problem for many people. That said, many of the people who complain about this aren't doing themselves any favours. These are the people who are ordering entire meals rather than just the burgers and water (which beefs up the energy consumption), who don't walk anywhere or exercise in their own house (if the streets are unsafe), and who don't count their calories.