But what's the point if you're just going to use Android Auto or Apple's car-thing instead? You're just letting some other company invade your privacy.
OsmAnd works fine in Android Auto with WiFi and mobile data turned off. Sygic does too. I believe TomTom also sells navigation apps that will work fine under these conditions.
I use Android Auto mostly because I don't trust manufacturers of car components to maintain their software and to put more than bargain bin SoCs in their infotainment consoles. There's no need for your Android phone to have a connection to the outside world if all you're using it for is locally installed apps.
Assuming things much? It's actually totally reasonable to opt out of both of those, too.
Then on the other hand, who cares about those when your car is already tracking you? /s That kind of helpless reasoning needs to die.
Consent and convenience. When I use google maps, I am trading my privacy for accurate directions and traffic times. When I buy a car that sells my location, and I get nothing in return, I feel like the deal is inequitable.