Can you imagine the bulletin board material the coach would have, telling his team "Hey, Coach Soandso just called to let us know that not only were they going to beat us,, but that they were going to hang 10 TDs on us. I've never heard of a more blatantly arrogant thing in all my years of coaching. How do you guys feel about that?" That's the prelude to a Rutgers upsetting a Michigan, for example.
I think that type of semi-apology / explanation is best left for the post-game handshake, and can be reinforced in the post-game media conference. A coach can allude to the way things work in the weekly media conference leading up to a game, but no coach worth a damn as a person would ever make such a call. Coaches generally maintain a good amount of respect for each other, unless not warranted, and are rarely if ever that over-confident.... in fact, they preach to their own team to not be over-confident!
That said, all coaches are aware of what is needed to reach post-season goals. The days of the JVPs of the coaching world taking the air out of the ball late in a game already in hand, and before the need to take a knee, are far less prevalent. Whether that is right or wrong, it is the way it seemingly needs to be to reach those team and individual goals.