Flying cars beyond the cool factor make me very uncomfortable, aside from his joke about a hubcap becoming a guillotine, how do you solve the problem of mainten

Flying cars beyond the cool factor make me very uncomfortable, aside from his joke about a hubcap becoming a guillotine, how do you solve the problem of maintenance? If you require a regime like light aircraft they'd be ferociously expensive, current land cars are already showing remote capabilities that are worrying, shutting down a car remotely is bad enough, shutting down a flying car is catastrophic and then who controls them, if they are autonomous they become programmable aerial weapons and if you human operated they become both weapons and machines for screwups (and drunk drivers). I just don't see a future for them outside of billionaires play things.