His system shows he doesn't have much faith in guarding one on one, he sends a double almost everytime down the court but I disagree that you cant guard one on one you just have to have faith in your players abilities to get the job done.
I think he is right. The game is now more of a team game. And it is difficult to guard a guy one-one in the NBA these days. But if you try to double team it will take one extra pass to nail that 3 or shot.