Makes sense to me. They are saying since apple owns the os and itunes on your phone, Nissan owns the programming on your car.
Ive seen you tube videos of guys reprogramming their evos and such cars and completely screw up the engine causing physical damage and costly repairs. Thats not a warranty repair and shouldnt be expected of the dealer to fix. I amsure this is the route they are taking to eliminate it.
Likewise reprogramming to allow higher red lines, mo power output, etc, etc, etc. I dont think hacking a car should be off limits, just that it will void waranty claims if it causes a failure.