The situation is completely reversed outside of a NYC like dense area where everyone has cars. Once you have a car, it makes economic sense to use it and you will likely drive near a grocery store at some point in the week. The grocery stores are also not constrained on space so the quality is much higher and rent or land costs less so prices are lower too.

Although, I do have to say grocery stores in London and Toronto were much nicer than NYC in my experience, so it may be a cultural/customer demand thing too.