So, you're implying that while the Captain asleep........
"So, you're implying that while the Captain is asleep in the bunk that the aircraft is less safe...."
Eerr YES.
Let's see, a serious inflight emergency with a Captain in the left seat and an experienced and fully type rated F/O in the right hand seat or same emergency with relief commander and a part type rated S/O. Doesn't take a lot of thought really, does it?
Perhaps AF447 might have been a bit different if the Captain had not been on the bunk when it all went wrong - who knows?