We are...sort of.
When you're living the off-grid, farm life, you're also, for the most part, out of the normal cash economy-at least you make every effort to stay out of the cash economy as much as possible. So what happens is you try to make use of every available resource-especially for food. It's not exactly survival, but every piece of food you can shoot, catch, or grow, means your limited cash resources can be used to purchase things you can't procure outside of the economy-typically these are finished goods: gas and oil for chainsaws and vehicles, tools & equipment, etc.
So it's easy for some folks to somewhat blur the lines between "something to keep around a country home to go bum in the woods with" and "survival."