And what people are forgetting is that using farm tools could increase your skill with weapons. There was a book in MW called The Axe Man about an assassin who was raised as a slave or servant, and basically after using a hoe, mopping the floor, and threshing wheat he was really good at swinging axes into people's faces, especially his master.
Plus, anyone play Minecraft? You need food to live, and you can't buy it. You can hunt but only so many creatures spawn. Plus, there's zombies at night.