the decision based on the roar of fans. He sees the result on the field, he hears whatever frustrations players may have. I don't remember the exact quote, but Gabe Juedy-Lally said after the game he's been asking to do a corner blitz all year. A head coach is going to be aware of those kinds of things.
Sure, maybe some boosters have spoken, but I think it's more him being realistic with what he's seeing internally. Could be wrong...I'm just a fan on a fan board.