I don't really think that's the moral of the story, Bluetooth in car stereos brings value to people, many use it. You could fix this pretty easily with more separation between the stereo and the "important" components.

Well, you could buy an aftermarket stereo with Bluetooth then. Something that's not integrated in any way with the rest of the car other than power.

..sure? The average person who buys a car does not want to do that though, so selling stereo-less cars is completely unrealistic.

Not having Bluetooth would cause accidents, as more people would use their phones while driving.