All very valid points, but one thing still remains - 747s, etc don't land on oil rigs and they are also better suited performance-wise for their job! As long as we are landing in such places you won't ever get down to those safety figures overall, although there are companies that have achieved better than the airlines already without Shell's help. That's not to say we shouldn't be trying though!
Proper training, of course, offsets a lot of this disadvantage, as does a proper safety culture
Phil