When I was growing up my great grandmother had a little farm with goats, chickens, a large garden and rabbits. Most of the food we ate was fresh, generally from the garden and from the livestock, with the exception of flour, dried beans, rice and occasional pasta. She used to trade eggs, chickens, produce and rabbits for other types of meat that neighbors in the area raised or had or hunted. Venison, trout and sage hens were common in our diet. We grew up cooking from raw ingredients because we could not afford the "fancy boxed stuff" and because my mother despised the taste of canned vegetables (as do I).
I still have a large garden and try, at the very least, to have fresh vegetables and fruit but I buy my eggs, chicken and fish and very occasionally, beef or lamb at the supermarket. Most people I know though eat pre-prepared food pretty much every night, either frozen or canned.