I mean I get the in universe explanation but it still seems weak and illogical. To me it would be like having a car whose engine runs off gas but whose radio/infotainment runs off diesel. IF for some reason you find yourself out of gas to run the engine and move the car you can still play the radio? Okay cool but why not just make both systems compatible so you can cross connect them or use fuel from one to run the other in a pinch, that way if you run out of gas you can siphon some more gas from the auxiliary tank and fire the engine up and get yourself to safety, which is better than listening to the radio while you wait for a towtruck.