That two competent pilots allowed the aircraft to go into a dive on autopilot with full throttle is just a bit far fetched, don't you think?
Maybe B772 was a little too subtle for some of you. Try changing the word incapacitated into terminated.
I do understand that many people with a minimal aeronautical grounding feel more comfortable with any theory that includes mechanical failure. The idea that one person can be directly responsible for so much carnage doesn't fit well with our humantiarian side. It is also an unnerving thought for any passenger. However, history shows this to rarely be the case.
I know the pressure that working for a company like SIA(Silkair) and living in a country like Singapore can bring where your entire value as a human being is measured in monetary terms.