chadzdat..
Im not disagreeing with you, I'm just saying that there's more factors in play.
Most pilots are mature and endeavour to achieve adequate rest prior to their shift.. Sometimes it can happen that you're too tired (regardless of attempt to achieve adequate sleep), does Jet* have reserve crew in place for this instance? Once again going back to the rescue chopper world, there is always (operator dependant of course) a reserve crew should the primary crews get flogged.
That being said, how many pilots (youngens and oldies) do you know turn up to work after being out the night before or renovating the house etc instead of making sure they are well rested.
Ive been guilty in the past, and have changed my ways.
** Maybe I'm just fortunate and work for a good operation, the annual FRMS training (chief pilot/ head of flying operations drumming into you their expectations) seems to sink in.
I've said my piece, fly safe
TID Edit