RWA
When you move to the left seat in a Boeing 737/747/757/767/777 you have to mainly fly the aircraft using your LEFT hand, the right covers the thrust levers, so it is NO different to an Airbus!!
Putting it between your knees would not solve anything on having to use your LEFT hand. Are we now to have a major design change because 1 guy could not "fly" the aircraft properly.