I recall some years ago, that Saab built a car without steering column or wheel using 'steer-by-wire' technology and a joystick mounted on the transmission tunnel by the drivers thigh. 'Car' magazine tested it on private roads and found that although requiring quite different techniques learning to control it was quite easy. What they could not do, ever, under any circumstances, was let go of the joystick unless the vehicle was stationary.
Now, I quite understand that while a car needs to be driven all the time that it is moving and an aircraft does not, could there ever be a time when the Pilot is actually flying the a/c, that he feels it imperative to move his hand from the stick? If so, what happens next?
You will probably have realised that I am not a pilot, and if I have missed the bl**ding obvious, then I apologise and will return to my burrow immediately.