If someone steals my car, I can open an app and find its precise geolocation better than some cameras, and deliver that information to the police of my own choice. (Ideally, the car company would be legally prohibited from sharing that information with any other party.)

"Monitor the movements of everyone in case of the minute chance of car theft and astronomical chance of the police caring" is patently absurd. We probably need cameras in bathrooms too, in case someone passes out and needs medical attention.