When a QB calls a play in the huddle, and the players run the play, but the QB holds the ball and scrambles all the time, the "called play" doesn't ever get ran. [Ben].
When you call a play, and the QB runs the play, the called play gets ran.[Luck].
Ben is a schoolyard QB, and Luck is a pro QB.
Ben can't throw on rhythm, nor the deep ball.
Luck can do both. = success, and a HC job for the OC.