Kind of a yes/no from me. The way I look at it is, there's only a short break between possession. Teams can reset mentally during that break while making some adjustments - even if just getting your head back in the game. Wisconsin looked on the ropes on that final drive and Nebraska took their foot off the gas.
Wisconsin had shut them down for three quarters but that changed on that final drive of regulation. The reason I say go for the win is that if you get that TD, suddenly you've got all the momentum. You've got a team that believes they can win because look at the score - you're now in front. Your best unit will be on the field to seal it. Get a score and let your best unit win the game.
By playing for overtime, it allowed Wisconsin to reset themselves. They weren't rattled. They weren't feeling the pressure of giving up the game winning TD. They knew, based on Nebraska's conservative tendency at the end of regulation that even if Nebraska had scored a TD, they weren't gonna go for 2. So, when the Wisconsin defense got back on the field in overtime, they could play free knowing even if they failed, they still had another chance to win it. Nebraska's offense now had all the pressure again.