That may be a factor ^^ but I was still surpsied at the points and shots in the paint while 'not being aggressive'.
I think the "not being aggressive" thing is a little of a generalization. I think the Lakers were aggressive. The difference was the defense. The Celtics defense was always in position, so they were challenging shots. The Lakers on the other hand were always a step (or often two) late, so instead of challenging shots, they were reaching and grabbing.
I actually think the refs were letting both teams play aggressive defense last game. If the defender was in position for either team, they were letting them be very physical, however, if they were reaching in at all, they were calling fouls (on both teams).
I think the best example of them calling it on the C's was when Powe made a clean steal of the ball when the Lakers player was taking it to the hoop. But because Powe was out of position, and was reaching in, the refs saw that, and automatically called the foul. If he had been on the spot, blocking the basket, and had made even more contact, he likely wouldn't have been called for anything.
The offensive aggressiveness is overstated, and is basically a fall-back used by the media who don't really pay much attention to the actual game.