We not going to see single pilot operations for some time to come. Airbus is talking about cutting down from 4 pilot to 2 on ULR flights, not single pilot operations pe se. Both pilot will still be required in the flight deck for at least another generation, probably 2.
Kindly supply a reference for your statement that A350 is capable of gate to gate pilotless operations. I am aware they only just did the first "auto take-off".....even then I have doubts about how that aeroplane is going to manage an abort and the subsequent evacuation.....I would also love to see how that plane manages to taxi in any airport in Africa. Many concepts are nice in theory but unworkable in practice.