I don't know how many times we're going back n forth on this, but the fact is still and will be, that you're only eating to survive. We all know food has been a cultural thing for the ages, people been gathering around to eat, it brought people together from time to time but still, the main priority is to survive. If it wasn't, we wouldn't need to eat - it's simple as that.
People being obese etc. it's all about survival as well. Our bodies are more adaptable to gather fat, than lose it so it's still on a survival mode. Our body doesn't know when the next meal is, it just simply gathers all the fat etc. to make us survive.