Electric utilities are also regulated monopolies, they can't just cut my power without running afoul of a ton of laws. Even in such a ridiculous scenario, you can make your own electricity. You can't make your own gasoline.
I can't do that with electricity right now.
https://metro.co.uk/2013/09/25/law-lecturer-told-he-cannot-b...
Just because they are a regulated utility does not mean they care about you. They will do anything and everything that their regulators will let them get away with.
I suppose you go solar coupled with a whole-house battery storage system.
Probably win a court case (and sizable payout) against a corporation cancelling your ability to drive your own car.
They would cancel your license to the software that operates the car. John Deere already does this with their industrial-scale farming tractors.