You could say the same thing in football. The center calls out the blocking assignments and tells the line what to do. The receivers, tight ends and running backs have to know which routes to run, what holes to hit, or what defenders to block.
But in the end, the QB is the one that runs the offense and makes sure that everyone is on the same page. The QB is the ultimate decider on the field. A great PG is the coach on the floor, just like the QB is the coach on the floor.
In his prime, J Kidd was like that, calling his own plays and running the team in the same way the Peyton Manning runs the Colts offense.
As much as Tim is an initiator on offense, he's no Peyton Manning.