If our two gut biomes where examined by the same gastroenterologist, they might say mine is more bacterially mono-cultured and yours is more cultured. Who's to say that's bad?
An experiment that isn't reasonable: Go to a Gastroenterologist, tell them you regularly or have no issue eating molded food/expired, and see if you carry the same heath insurance provider within a week.
You would balk at the realization that those eating habits you mentioned aren't thought of as "healthy" by those analyzing healthy eating habits and adjusting insurance rates off of it.
I balk at people throwing bread in the trash, that was near sacrilegious lol.
Anyway, people lived. There was struggle, yes. Perhaps it was better than the meaningless waste of life millions have today.