Yes, and I used to live within walking distance to several, and this has been the case everywhere I've lived in the US. However I don't even really think of walkability to grocery stores as a good metric for urban planning - I've since moved and get groceries delivered instead. I don't need to own a car, there are fewer cars on the road doing specific tasks. Good urban planning is flexible around the reality that the physical world is hard to plan and change for.