There's a part of me that hopes that if Jake went down, Jay could step up like Brady or Rothlisburger. My hope isn't born from wising injury on Jake, but from the hope that we can pick up the slack of an injured player.
For perspective, I have the same feelings about other backups like the linebackers, running backs, and safeties. I think the difference is that those other players would become backups again once their respective starters healed up, whereas Jay would take the spot permanantly.
Things I am guilty of:
I think Jay should start the latter half of the season. I think that our offense will be better under Jay. I think that Jay will scare more defensive coordinators than Jake does, and I think Cutler will be amazing.