The Jets are doing that with Mark Sanchez and their fans aren't up in arms. It's the way Miami, Baltimore, Tennessee, Atlanta, and to a lesser extent Carolina won ball games.
Is it because the 49ers do not have the talent to play this way?
Is it because it's a culture shock? "DATZ NOT TEH WAY DA OLD NINAZ WALSH DID DA DAMN THANG!"

Is it because it's boring?
Is it all of the above?
This is going to sound obvious, but our talent dictates the way we play. If the 49ers had a more talented QB, and better faster WRs, I would assume you'd see a more wide open approach.

we had a chance at the kid that Carolina picked up with our pick but hay Mclueless knows what is he doning. the kid they picked up is the same size as harlson and faster and his spicalty is passrush ! but hay you want to run 60% vs steelers we are going nowhere vs good D we are going nowhere then what rely on the 40% which is depending on the 60% wow is should be 50/50 ! Shotgun formation cuz of blitzers and s**t like that !