This sounds good in theory, but Ham would only be cutting off his nose to spite his face with this move. It would be in conflict with what management wants, and he hasn't established himself enough to start swinging the axe around just yet, especially on an organization like the Lakers. As you know, and as I've reiterated, this is only his third game as coach. He simply can't be making those types of moves just yet. He already tried to bring Westbrook off the bench, and then got blamed for causing a supposed injury.
He's got no choice at this stage but to let Westbrook fall on his own sword, rather than get too close and get stabbed himself.