That's true, but again, PJ is asked to do very little: Dump the ball into a 7 footer or AA, shoot open 3's and play some D. That's it. He doesn't create any problems for the opposing D and if his shot's not falling, it's not like he can just start taking it to the rim and scoring or creating open shots for teammates.
Would rather have someone do what they're asked to do very well than someone try to do things they aren't capable of doing well to try to meet your criteria of what you want your guard to be. Then again, I'm into winning.