I think it is more Jim Harbaugh than Alex Smith.
Other than Jason Garrette (career clipboard holder), has there been an NFL QB that has been a HC in the NFL?
YES, MANY...............to name a few that come to mind.............
JASON GARRETT, COWBOYS................AVERAGE COACH
BART STARR, PACKERS..........BAD COACH
NORM VAN BROCKLIN..........GOOD COACH
DAN REEVES................GOOD COACH
GARY KUBIAK...........AVERAGE COACH