Busy doing what exactly?? A lot of F/E's made a huge thing of playing with oil cooler flaps, when if you just leave them faired on the ground and at 20% once airborne you can just leave them there. Or maybe busy accidentally switching off engines instead of switching on engine anti ice...?
I respect your opinion about needing the F/E if you haven't seen two crew. Believe me though, its great, its more enjoyable, its easier and when you get the chance, if the F/E will let you (!) just try some 2 crew operation and see for yourself how it works.