Because I feel that the problem with the offense is primarily a QB problem.
Rumor Alert:
I just found a story on SI.com that indicates Chicago would be open to the idea of trading Cutler after this season ends. It mentions that the $31.5M he is guaranteed in 2015 and 2016 would certainly give teams second thoughts in considering the matter, but it would be interesting to see what coaching staffs think they could turn Jay around at his age, and what Emery would be offered in return.
Jay Cutler trade rumors: Could Chicago Bears trade QB? - NFL - SI.com