Throwing the ball almost 50 times in a game will make it tougher on the Oline to pick up the pass rush 50 out of 50 times... thus causing #9 look like #2(double meaning) on occasion.
There isn't much choice when your oline isn't getting it done in the running game. The only back that has really been able to run this year is Chris Ivory and that's more because he makes his own holes than anything the o-line is doing.
And, that still wouldn't excuse guys running untouched at your QB with only a 3 or 4 man rush.