Or your car will not start when you use the wrong mouthwash, or when you are the designated driver, or when in an emergency on the way to the hospital after using rubbing alcohol. Or you are drunk and get in your car for whatever reason and the doors lock and call the police when you had no intention of driving.

Or and here's a fun one, not wanting to be treated like a fucking criminal with a item you paid many tens of thousands for!

And all that is off the top of my head before getting into the nightmare of who gets the data.