In rural areas prepping (before it even was a word) is a way of life.
When you have about an hour to travel to a decent grocery store/supermarket, your shopping list looks little different from folks living in more populated areas, cities, etc. For us it is that if you forget buy something, you go without till the next shopping trip. Forget an ingredient equals to improvisation and sometimes hilarious culinary outcomes.
Trip back wasting 2.5 hours is simply waste of time.
Canning and food prep comes from similar vein. In the aftermath of hurricane Helen we could give food away to our neighbors who were unable to move anywhere, had no power or otherwise.
In my opinion a little bit of food and water stored for later in smart even for city dwellers, since we do not know what future holds.