Uhh, no. Teams throw all the time in this situation. It's called "playing to win the game," not "playing not to lose." Maybe you've heard of it. Or maybe you've been brainwashed by Ferentz over the last 15 years into thinking this is the norm.
For instance, the Colts were ahead 5 points on the Packers last week and got the ball back with about two minutes left. Instead of blandly and predictably running on three straight downs to milk clock, punting the ball, and watching Aaron Rodgers come down the field and burn them, they threw the ball to pick up a first down.
I can't count the number of times I've watched a team run the ball to milk the clock and have it come back and bite them.
Happens all the time. But I guess it's "completely and totally foolish" to look at stats and facts and real life occurrences to make decisions instead of unquestioning adherence to an archaic, uber-conservative coaching philosophy.