No. It's like you're saying they it's hot outside because your thermometer reads 90. But it's hot because the sun is heating the Earth. The number on the thermometer is a result of the sun heating. Basically, if passer rating was what determined wins, then you'd see every team just throwing short easy to compete passes, so they could hit they magic passer rating to get a win. The rating is simply a result of successful passing plays...it's not the cause. I mean, it's common sense that winning teams usually have better passer ratings, but the passer rating simply tells you that plays were successful...it doesn't actually tell you anything about the QB. It does not tell you if the QB was making good throws, just that whatever he was throwing was being caught.