I agree that this is NOT the place (or the time) for fault finding in this tragic episode. None of us sitting at our PCs were there.. few of us likely have the experience and background to truly be able to understand the mindset of those involved, nor the actual conditions and/or reasons at the time of the incident.
It is disrespectful, speculative, and of no service to anyone involved to take this (blame) tack at this point. There's simply not enough information or evidence to make any meaningful conclusions about any of it.. the whys, or the whatifs.
I'd hate to muzzle anyone... so lets keep this civil, on topic, supportive and respectful of the people and families involved.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)