To those that think this pilot was "unsafe" or otherwise creating an additional hazard to flight safety: there have been plenty of aircraft crashed (and people killed) by perfectly functioning human beings with both hands on the controls of a perfectly serviceable aircraft.
I'd be happy to be on this pilot's aircraft.
How many "able bodied" pilots here would be willing to admit they lost hold of the controls (control column, throttle, or both) due to turbulence at least once in their life?