AFAIK the military drones are single engine so no control difficulties if the engine fails and no fatalities so no big deal. How long does it take to develop a new airliner from scratch? 15-20 years and one without any pilots on board even longer. So no pilot needs to be worried until Airbus,Boeing,Embraer, Mitsubishi etc have actually committed to producing a pilotless airliner and at least one airline has put cash down for a spot on the production line. Even with the oft quoted "Planes just land themselves" by the less educated amongst us the weather criteria is very limiting. Also
AFAIK there is no commercial aircraft capable of an automatic takeoff, one of the two crew has to pull back on whatever constitutes a control column and the other crew member is monitoring what is going on with the aircraft.
It is all possible in theory but the reliability and redundancies required and its integration with ground based infrastructure are a long, long way from being resolved.