Not to suggest it's a factor here or not, Huck, but I would say, as a longtime freightdog, that it's always possible if you're fatigued or dealing with a schedule flop.
If you're tired enough, you'll nod off on an ILS to minimums. At some point, fear and adrenaline aren't enough to stave off microsleep or full-on unconsciousness.
Again, not suggesting anything- we'll have to wait for the NTSB to pull the data off the boxes and present it.