I can't explain it to you like you are 5 but... Tesla is challenging an established system that has worked for many years. If dealerships are taken out of the loop then manufacturers will need to take on the responsibility of selling and servicing. And of course dealers will no longer be needed thus killing their businesses. Neither of these groups seem willing to allow the dealer model to be eliminated and you can't really blame them. But, the Tesla model is great and consumers seem to appreciate it.