This ain't tennis or boxing, no one player is responsible for winning games. RTs job is to play QB, run the offense, etc etc. If I had to put a number on it I'd say 80% of the factors which determine wins and losses are beyond the QBs control. And yet they're often judged by wins and losses. Just once I'd like to hear someone say LB or OL player X is good but he let his team down in crunch time, or that WR/DB player X might be replaced if his team doesn't make the playoffs. Those fallacies are only slightly less asinine than saying a QB was responsible for a win or loss. Again, QBR does not measure the performance of the QB, it measures the entire passing game. You can try to dumb the game down all you want, stats are a good way to do it, but really you're just clouding your own view of things.