When a piece of a neural network becomes corrupt and entrenched beyond repair, (cancerous) the tumor or cancer fights to protect itself, there are two solutions to these kinds of problems.
1. One solution is what Musk is doing, treat the dealerships as a cancerous growth in the mind, and pathways are built to bypass it, route around it. Don't fight it, don't fix it, don't interact with it. Establish as many barriers to its growth as possible and starve it so it doesn't grow. Eventually the superior paths created by Musk are the preferred ones to use, and the defective paths are garbage collected. The cancer will seeks to prevent the growth of new pathways because it does not want to be garbage collected.
2. Remove the growth. When the surgeon finds a tumor or cancer in your brain, it doesn't try to coax it to become better or try to "enhance it" to be better. A hole is cut in the head, and lasers and scalpels are used to physically remove the cancer.
These are the only two options to deal with cancerous growths working only to maintain its take on the system.