If there was mechanical difficulty - why would they head there?
If there was a hijacking - why would they head there?
Why would a guy on top of his game just throw it all away???
He may have needed time to consider whether to land the plane on the surface and let it sink in the deep waters, or to take a nosedive from 35,000 feet and 500 mph.
Perhaps they planned something nefarious, and if failed?
They were all already dead. It's just the direction the winds and the circumstances pushed the ghost plane.
If there was a hijacking - why would they head there?
It wasn't a hijacking