Agreed on the design of most grocery store in the US. Most people can't stop in quick on a normal daily walk, because the inherent space-inefficiency of cars means a long detour to hit multiple stops, whereas with walking it's an easy in-and-out grab.
However, even when patiently explaining this difference, it is a mental leap too far to consider any change. Not only is it the physical design of the stores and car-only infrastructure, a lot of it has to do with package sizing and pricing structure, as another poster pointed out; smaller quantities get massive markups in US stores, for no good reason other than once they've got you in a store, you're fairly captive and they want to extract the maximum amount of money from you so that you don't end up elsewhere.
Until people experience it, and realize that having a five person family is no challenge at all for this style of life, it's hard to give them the picture.
However, even when patiently explaining this difference, it is a mental leap too far to consider any change. Not only is it the physical design of the stores and car-only infrastructure, a lot of it has to do with package sizing and pricing structure, as another poster pointed out; smaller quantities get massive markups in US stores, for no good reason other than once they've got you in a store, you're fairly captive and they want to extract the maximum amount of money from you so that you don't end up elsewhere.
Until people experience it, and realize that having a five person family is no challenge at all for this style of life, it's hard to give them the picture.