Game managing isn't too hard, I agree. A point guard who simply brings the ball down the court and passes the ball to the first option and then spaces the perimeter isn't very difficult to find. It's akin to a shooting guard or small forward like Martell Webster: just finds an open spot and waits to get the ball swung to him and fires. It's the basic role and you can win with players filling the basic role at certain positions, if you have exceptional production from other positions.
What is rare is a point guard who doesn't simply start the offense by passing the ball to the first option but, rather, consistently gets his teammates better scoring chances then they could have created for themselves. This can be done two ways (or a combination of both): drawing other defenders to him and great passes that get the ball to a player in a position that the defense will have trouble preventing a score.
Blake can't do either one...collapse the defense or make exceptional passes (which come from court vision, decision making and actual passing ability). So he's not really an asset in creating better opportunities to score. He leaves it to Roy, Aldridge, Oden, Fernandez and Outlaw to create for themselves. His role is purely to bring the ball up, get it to one of them and then be ready to shoot open shots. Ironically, he gets shots created for him by others, rather than vice versa.
So, what you see out of Blake isn't really the point guard play that is hard to find. It's game management, which beats point guards like Damon Stoudamire who (due to bad decision making and a scoring mentality minus efficient scoring ability) can't even manage an offense.