Urban Meyer is a top 5 college coach and the only comparable coach for dual threat QB development made Sanchez look good for a few games. It is much easier to insert a 3rd string guy due to injury, then it is to bench a very talented first string guy having turn over issues. Hindsight is all well and good, but rookie starters tend to be turn over prone.
Should the bears have started Clausen mid season? Couldn't have hurt much, but it is really difficult to bench the veteran.