personally i think you are looking too much into this 6th man thing. you could pick apart basicly any of the awards and come up with a reason why its bullshit. davis is playing great off the bench. if he started his energy would be wasted at first. like i said before its the 6th man award not 6th option award or award for the player on a team with the 6th most playing time. you come off the bench first you are the 6th man its that simple.
btw there is alot to be said for coming off the bench and scoring the way ricky does. its alot different when you actually start the game.