IMHO...teams take on the personalities of their coach and their opinions.
So, it is just my thoughts but I am guessing the coaches preach taking care of the ball to a fault. For example, coaches should not scare or worry their players about making some mistakes. They need to learn from them and improve by doing so....to a degree.
Manuel and Orton both threw down field more when they took over as starter and then slowly regressed. Maybe Marrone and Hackett are too passive and preaching the wrong things and the players are playing on eggshells instead of playing. Maybe with the Oline too? Remember Kujo's comments earlier in the season. And Manuel's when he was removed as starter. I don't think Schwartz has the defense playing like this, fyi. Thoughts?