[esotericimpl]

It's completely due to prior to 9/11 you left the hijackers alone and they would land the plane, get arrested or die in a shootout with the police.

Now if you attempt to hijack a plane 100-300 passengers will beat your ASS and stop you before you get anywhere near control of the aircraft.

There will never be another hijacking attack where the pilot loses control of the plane from a threat of a would be hijacker.