Yeah just because stores sell food doesn't mean they should feed people for free. There are a lot of costs involved in getting food onto the shelves such as planting, growing, harvesting, transporting, packaging, and distribution, and the costs of running the store. This especially applies to small mom and pop stores.

Same sort of thing with non-food items, track any particular item and they don't just appear on the store shelves, it takes a lot of people and effort and materials to get them there.