I've heard someone saying that one reason to consume raw meat is due to the fact that cooking oxidizes the fat, and like seed oils it becomes toxic. I'm just not sure to what degree this happens. Also we have been cooking meat for probably 2 million years and if it were a problem then we would have adapted to it genetically. I have also heard that saturated fat is much more resilient to oxidation from heat than poly unsaturated fats. So, I'm not sure if this argument holds any water.