It's not just whether he is worse, but a GM has to have a plan, a place for Cutler to fit in.
For any given game, his skills might be appealing to a GM, for others his poor decision making takes him off the list, but either way, Cutler isnt young.
I cant see a GM thinking Cutler is the guy of the future, and you dont spend draft picks on a QB for now.
They'll wait until he gets cut because even if he doesnt fall to them, it means one more QB on the market, and that improves the QB they will get likely even if it isnt Cutler. Thats how I imagine a GM would think about this.