Except that our environment is so drastically changed that the foods people generally eat lack the nutrients that used to be in the soil. If veggies are grown with man made fertilizer than all those good things that made the veggies a powerhouse of nutrition are gone. Same goes for animal products, obviously that is why we try to eat GF beef and pastured pork and other animals.
I'm not advocating synthetic vitamins but you are not giving the whole story. Early man didn't have 99.9% of what we have, sometimes using updated components of life are good. Grok one went after a wild animal with his bare hands, Grok two used a club - did Grok one say that the kill was no good because you upgraded to a new idea? Man evolves, hopefully in a good way.