Seriously, though, I get it, even if Peterman was one of the original NFL memes for being so awful as a starter.
The point of the #2 here is not to play and win games. It's to be a vet who can help manage the game from the sidelines. If Carr actually has to miss significant time, you roll with Haener.
Haener is so far from even being ready to spot play for a game or two. Or at least showed no signs of being close early last season. Hopefully Carr stays healthy.