I know it’s a shipost and this meme is at least 15 years old. But meat, cheese, and white bread (especially the ones in the US with added sugar) were never healthy

meat, cheese and bread were never healthy, says a man descended from 10 thousand years of meat cheese and bread eaters

it’s about the scale at which these items are consumed - eating meat every day was pretty much unheard of

In some circumstances you’re absolutely right. In many parts of the word, meat was either scarce or difficult to preserve. In other parts of the word, some peoples survived almost exclusively on animal products. The natives on Alaska are the first that come to mind.

Of course “meat” was a very important part of their diet, they relied heavily on organ meats for their essential vitamins and nutrients. They were significantly more humane and less wasteful than we are today.

But they were also out and about hunting that stuff for days. Unlike average Joe American who never moves more than from bed to garage and from the parking lot to his office chair in a day.