we would prefer you run all night
They were pass heavy that entire game! Not including the final posession where they were icing the clock, they had 33 passes to 19 runs. Thats nowhere near 50/50, or what the 49ers usually do.
Look at this season for comparison, 161 running plays to 95 passing plays.
They are a run heavy team because they can afford to be. If they are playing from behind, which is very rare, they become a pass heavy team. The stats are all there for you to see.
Also vs. the Saints in the post season. Very pass heavy that game despite being ahead early. 42 passes to like 20 runs.