Fully agree - this warning message is dangerous! Not to my hearing, but to my life! I have to unlock the phone, override a warning message, then re-adjust the bluetooth volume on the phone, just because I chose to change from radio to bluetooth as I'm driving?
As I'm driving - this is unacceptably dangerous.
And really, in a second-hand way, to my hearing also - if I have to crank the volume to 45 to get a decent output level that matches the radio when I switch to Bluetooth... and listen all the way to my destination...
...when I get back in my car to drive home, the car holds the same volume level but always starts out on "Radio", which is then at an unbelievably loud volume level.
And that's to say nothing of the fact that the Bluetooth volume level is really just a line-level adjustment. Connected Bluetooth devices (like a car, or Bluetooth speaker, etc) have their own volume controls. It makes that warning inappropriate as well, as the warning then inherently isn't with regard to the actual volume level.
Totally unacceptable. On all levels.