To only punt once in the game and only score 20 points... think about that for a minute.
When the Saints only punt once or not at all they hang 40 on defenses. I think they were caught up in the whole "let's keep the ball away from Mahomes" thing, and it worked for them for most of the game, but they never thought KC would score 21 points in 8 minutes.
You gotta score on those guys you can't try to play "keep away".