I believe it. He is right. The team's offense was too heavily reliant on Rondo with the ball, and this hurt everyone but Rondo.
For example, Rondo could be as good if not better than AB cutting without the ball. He is insanely quick. Question: how many times does Rondo score or create on a cut OFF THE BALL in a game? Once? Never?
Maybe Rondo will see that he can do all of the things he used to do without having to dominate the ball.