I understand what you're saying Chidi. But we almost let a game slip away over being " a little off". To me it's like a pitcher who's curve isn't working for a particular game. A smart catcher quits calling it that day, particularly if your lead is in danger of slipping away.
But to your overall point that it wasn't the Steelers that were having problems today, but just Ben. I think I'm buying, and like you I'm fairly confident that this was a one half thing and he'll have things worked out by next Sunday and be on his game.
Basically if Ben is on his game today, there's no concern whatsoever about today's game.