It isn't hard if you buy the actual raw ingredients and cook for yourself. Produce is fine. Cuts of meat are fine. You can get plain old beans just fine for your vegetarian needs.

It is just people in this country have forgotten how to cook. Grandmother made her own mayonnaise. Mom bought kraft. To you making mayonnaise is a black art since mom never did it, so you also buy kraft. Extend that to most other food products.