It's not that they don't carry produce, its just that it doesn't sell even remotely fast enough and so is generally rather bad looking. It's easiest to see when the item in question has an expiration date, its extremely rare to see anything more than 3 days in the future, and not all that uncommon to see expiration dates in the past. So there is produce available, but it's somewhat mushy and generally not all that good as anything other than compost. As for the places that don't carry produce at all, they have to deal with produce spoiling as well, and dealing with keeping things actually fresh. Combined with the fact that at least here obesity doesn't care what race people are, there aren't many people shopping at cultural grocers, which is all that's here in terms of local. They at least have some selection of canned vegetables, unlike the major chains which have a trivial selection of almost expired and frozen vegetables.