I agree. The technology is available now to have pilotless aircraft. In fact in the military these are in use as spy aircraft already,and better,larger types are on the drawing board right now.
Ofcourse no passenger would fly without someone being up front nor would any regulator allow it,or should they,but the fact remains it could be done. Single pilot ops are a certainty one day in my view. Maybe not in 10 or 20years but it is coming. Computers will do all the work and the pilot will only be there in case of emergencies or other malfunction.
If you want to an example just look at the latest trains such as the Magna train in Shanghai. All run by computer with one driver riding shotgun for safety.
Just as the Flight engineer dissappeared so will the second pilot.