It's different because the self-driving doesn't entirely happen within the vehicle. Tesla maintains a road database to base driving decisions off of and it's assumed you obtain that information from the network.
> Initially, the vehicle fleet will take no action except to note the position of road signs, bridges and other stationary objects, mapping the world according to radar. The car computer will then silently compare when it would have braked to the driver action and upload that to the Tesla database. If several cars drive safely past a given radar object, whether Autopilot is turned on or off, then that object is added to the geocoded whitelist.
So, you will likely be accessing a service to use the self-driving features. At that point, I think it's technically within Tesla's rights to dictate how that service is used.