Comfort and Convenience
After outdoor errands, a passenger still in a coat may want less cabin heat than someone in lighter clothes, because each arrives at a different temperature.
Safety and Driver Assistance
Sitting still on the driveway, it helps to feel how the indicator stalk and washer stalk move, so those actions are already known before a night collection.
Multimedia and Connectivity
If a podcast is playing during a wait outside school, being able to pause or change volume from the cabin keeps the phone in a bag, when that control exists.