"He said: "This is a shocking finding. If you make a mistake at 30,000ft it is a little bit different from a worker who has not got several hundred people's lives in their hands."
A bit simplistic! Such a mistake would not immediately be fatal! How does this 'overtired pilot' get home? Probably driving his own car in which 1/10th of a second of inattention could kill him! Driving tired is more immediately dangerous than flying tired, with 2 people in the cockpit checking each other IMHO. That said the findings don't make pleasant reading.