Your first point is very good. I wonder how much cannibalism has influenced the evolution of human social behavior. Fat on the hoof is a great thing to have around when there are restrictions on food availability. I wonder if people who overconsumed were tolerated at all because they could be killed and eaten and keep a number of people alive long enough to get through hard times? That might explain why humans have such an aversion to becoming attached to fats. It would be like wanting to marry a salmon or bear.