Yup. And almost anything cooked at home from raw ingredients will be a step up from that.
Who is it whose line is "don't eat anything your grandmother wouldn't recognize as food"? I think just going that far back would improve nearly everyone's diet, never mind ten thousand years ago.
My grandmother was a farm kid who was raised by her father and uncle, neither of whom knew how to cook. She wouldn't recognize as food most of the once-exotic-now-commonplace fresh fruits and vegetables (mangoes, kiwis, avocadoes), not to mention 98% of the stuff on the pages of Bon Appetit. She fed her family fatty beef roasts, mashed potatoes (made with milk straight from the cow), and boiled-to-death lima beans and brussels sprouts about 5 times a week because that's all they could afford.
My OTHER grandmother was, I guess, a pretty good cook, though. Being Catholic in the pre-Vatican II days, they ate LOTS of fresh fried giraffe, caught by my grandfather (who was a great giraffeerman). She still wouldn't know what to do with arugula, though.