And sure, most people I know in rural Minnesota hunted, fished, and had gardens. They still went grocery shopping. Maybe is was only once a week because it was a long drive and not a quick trip to a corner mart. Also, we had Schwan's delivery groceries in the country long before home-grocery delivery was a thing in most cities and the Sear's catalog before Amazon. I mean, sure, there were (and are) some areas of the country that are so remote that you have to rely on growing and hunting your own food and making your own stuff. But that was certainly not true for most of the US in 1970s and probably not since the late 1800s.