That period was when all the lords had captured the land and forced people to toil on the land, without access to large land ranges the average person cannot live independently

Before your ancestors would have kept a large herd of mammals and lived nomadically moving to fresh pastures when the grass and vegetation was eaten

It's rare but there are some modern nomadic people who live like this camels and goats in the desert

Old diets were primarily carnivore and plants were struggle foods

That's why Europeans killed all the buffalo and why the Japanese on average are shorter because they had long periods where meat was restricted for religious reasons

Don't compare yourself to a people under exploitation, independence was taken by force