I think in this game, playing conservative was the right call. In this game. That is because Northwestern was so outmatched on offense that they were not going to be able to drive the ball 80 or 90 yards without taking massive risks and really the only thing that was going to get them in the game was to get a turnover or stop us on downs or something where they can get a short field and hit a play, get a penalty, etc. No reason to do that there with them. That kind of brashness, to take unnecessary chances is what got Wisconsin beat last week.
Now in a more evenly matched game against a competent offense, we need to go for it there.