It's not like Westbrook has to score 50 a game. He's doing this because he's doing what stars do... Whatever they have to to win while the whole team isn't together. When you have star-driven teams instead of very solid complete teams, you lose a star, boom, one has to really step it up.
It's not like he's going to be a baby once doesn't have to shoot 50 times a game anymore. He's just doing what is necessary. It's not like he turns into a nobody when Durant is out there. Like I said, they still both go off night in night out. THAT is the norm, not what is currently going on.