Your point is they can only score with a short field. So this is why they can only produce 443 yards of offense. Don't forget that Kirby does not run the score to humiliate opponents so the 4th quarter the offense is running the ball 3 times and then punting. So the 443 yards are mostly produced in 1st half or 3rd quarter. If the games were tighter and the other team can give the ball to Georgia much deeper they will produce more offense. Most games they were up by 35 points at HT and the 2nd half were not trying to pad the stats.