DAPT I would just say that in an emergency, the main thing to concentrate on is flying the aircraft to a successful landing and no loss of life. To hell with the radio. The person on the end of the radio cannot help you for the immediate future.
As for saying pilots dont understand the systems, im hoping you're joking. How many different types do the guys on here fly? How many of those similar types have slight variations? The 7 aircraft I fly are all the same type but some have switches in different places, albeit only minimal differences.
Our fuel systems are completely different to those being mentioned. We have two tanks and engine driven fuel pumps. We dont need to worry about transferring fuel during flight. Actually its forbidden unless in an emergency.