OK, some of the crew might have been relatively inexperienced or under-trained but they certainly weren't stupid. They were bright, skilled etc
How can you know that they were not stupid (whatever anybodys definition of that is)? How do you know they were bright and skilled?
I don't think the training records of the two F/O's are in the public domain.
We know that none of the crew of AF447 had done what they really needed to do - don oxygen masks.
Their blood oxygen levels after four hours at 35,000 feet would have been severely depleted
I don't agree at all. I and many others have managed to cope quite well with blood oxygen levels up to a cabin altitude of 8000 ft - been sat there for about 15 hours actually on a LAX to SYD flight on a 747 SP - I don't recall feeling anything untoward other than being completely bored out of my mind....
I've been sat there at 33000 ft and lost the 'cabin' - then I put on the oxygen mask and decended.
Korrel, with all due respect, I think you have failed to notice one or more 'elephants in the room'.