Look at it from the point of view of the Packers defense, they are staring down a likely loss where the ball was, 76% according to google, I would have guessed more like 80. Probably the best thing they could hope for is the Bears actually dropping back and throwing a pass as the Packers D would be gambling heavily to make a play if they did. The Falcons/NE SB comes to mind, Falcons had ball at the 30 and FG wins but the dropped back and got sacked and punted. The rest is history.