REX
To compare it to driving an HGV is displaying stunning ignorance of the highest degree. In really weather in a lorry you can step on the brake and pull over. In an aircraft you are committed to seeing it through to the bitter end (in an environment that is far more complex and changeable than the M4) at the same time as ensuring the safety of hundreds of souls on board with extremely litigious families. Burning human flesh leaves a slightly larger imprint on the mind and the conscience than a supply of IKEA furniture.
Likewise the lorry driver is unable to rely on automatics, ATC, complex aircraft automatics, 2 crew when it all goes wrong. There is an average of 8 people killed daily in road traffic accidents, 4 where sleepiness was a factor.
Where is more risk?
XOLLOB
Sounds extreme, but unfortunately I think it won't be long before a UK hull loss occurs, like colgan, only then will things maybe change.
Go there if you want but was there a suggestion that the crewmembers contributed, the C Word (commuting) caused the sleepiness, financial pressure (if they got off at base it was there cost to provide the room, whereas in Buffalo there was a paid room waiting for them)