Frankly, it's not your car, no matter how much money you forked over for it.
And, if you have a Tesla, you can verify this by disabling its ability to talk to Tesla. After some period of time, your car will no longer run.
Or you can crash it, get it fixed by a non-Tesla service provider, and watch it also fail to run. Not because of a mechanical failure or even a software failure, but because Tesla hasn't OKed it to run.
I'm curious about what happens if/when Tesla goes out of business. What happens to all those Model S and Model 3's out there - do they get OTA patched to no longer phone home, does the data coming out of the Tesla flip over to whoever purchases that capability from Tesla, or do they all just stop? It will be interesting to see.