Unprepared food was pretty much the only healthy food in shops before 1980. Poor people were more likely to need two bread winners..

The memes you are repeating do not match actual US or world statistics. They do make everyone feel better all around. I.e. even free enterprise and freedom of choice stories work worse when we are genetically tuned to choose ourselves to death and market tuned to profit from it. (A bag of potatoes is far more available globally than decades ago but a bag of doritos has a far more impressive availability increase.)