What I've read about the knee thing is that it isn't going to improve with a few days off. The offseason, more like. Until then, it's about pain tolerance and a likely injection or two in the playoffs.
I do think he's also angling for a shot at an All-NBA team, yes. I just don't think he's sacrificing team success for his own awards like has been implied. He's unlikely to make it worse by playing, but it also isn't going to get any better until the season is over. So it is what it is. I do admit that I'm worried about it.