Growing up I went through the same thing and eventually talked to my mom about it and we came to the conclusion that it all went back to her parents who lived the Great Depression. When you grow up on Bread and Butter pickle sandwiches and then have industrialized food thrown at you post WWII you don't question it, but it has impacts on subsequent generations.

Funny enough the other day I had a liverwurst sandwich, something my Grandmother would have easily recognized, except I bought it from a local whole animal butcher. What was once one of the cheapest forms of meat is now rare gourmet sandwich.