Uhh they went for it on 4th down because their FG kicker was hurt. You would have been behind by 2 scores at that point.
Georgia not having a reliable back-up field goal kicker is/was Georgia's fault. Can't criticize PSU for benefiting from such.
Besides, PSU does deserve some credit for stopping them on the 4th down too. Giving themselves an opportunity for a final 2-minute drill.