The issue is Tesla is not the limited number of Tesla dealerships, it's that Tesla's business model doesn't include ANY dealerships.
You don't go to a dealer to look at a Tesla and then order one after a long draw out conversation about pricing, you go to the Tesla website and custom build the car you want and order it. Even their brick and mortar locations (more likely a mall kiosk) are generally only information booth style setups to direct people to their website to complete the ordering process.
They don't have dealerships and don't want them but many states have laws specifically outlawing direct sales of cars with no real justification except that allowing direct sales would hurt existing dealerships. For Tesla to sell a car legally in those states they would have to introduce a 3rd party to open up a franchised Tesla dealership, a cost and hindrance that really adds nothing to the customer. If you happen to live on one of those states (and the list is growing), you would need to set up a mailing address in another direct sales friendly state to legally order the car you want, which is ridiculous.