You're still not getting the point.
He went for it ON PURPOSE, to prove a point either way. Get the 4th and 1, and the game is over before OM gets the ball again. Fail, and the D has to answer the bell again. In reality, the D got a stop, but was called for a bogus PI, so OM got a score.
It's all a teaching point. The offense was given a chance to prove a point - they could run it when OM knew the run was coming, and still get a yard and seal the game.
They didn't. I expect that leaves a sour taste in the team's mouth, which is good in a game still won by a blowout margin.