It doesn't really matter if Jackson starts or not. It's not unusual for coaches to bring one of their best players off the bench; sometimes, it happens when the good player has not played in a while, for whatever reason, and the coach opts to ease the player back into shape by bringing him or her off the bench--and sometimes the team seems to click with the new rotation, the good player coming in after a few minutes and the team responding with better overall play than it had demonstrated when the player was starting. And so the coach will stick with the idea because it's working. So long as the player is getting the minutes s/he needs to impact the game, that's all that matters.