Kung bushmen of the Kalahari desert were gatherers. They mostly ate 14 plants. They recognize 105 species of edible plants. Their diet was quite good in protein and in total calories. They worked about 2.5 days per week to gather food.
Agricultural societies work harder.
There was an association of agriculture and sedentary society. There was an association with cooking and with other detoxification of plants. Cooking made many plants more usable by man. Cooking arose before agriculture. Many hunter-gatherer societies know all they need to know about growing plants, but don't.