You've scored the last 17 points in this game. Your offense is gaining momentum, your defense made a few stops to help you stay in the game, you're at home, and unwilling to play for the win. Makes little sense to me to put there, despite the fact that we might be very well pinning the Bengals deep in their end.
At the end of the day, who do you have more confidence in? Your defense to make a critical stop, or your offense to gain a yard? It's not even debatable. I wouldn't trust Haslett's defense.