Though I agree he doesn't do it frequently, he does do it more often than what you're giving him credit for. He did it about 3 times last night, with nothing to show for it stats wise. The stats also don't count the times he sets someone up, there's a defensive rotation (that leaves yet another person open), and that someone passes it to the open guy. Everything was setup by TA, but he doesn't get the credit stats wise.
Another thing that I do agree with is that he's not hitting the open man as often as I would like, but that doesn't negate that he DOES set his teammates up more often than you give him credit for.