It has absolutely nothing whatsoever to do with hot/high/whiteout/glaciers/
It's in exactly these conditions that there is a higher risk associated with the landing, and this type of accident it's more likely to occur - conditions I assume you don't fly in regularly? Not often you land two helicopters on a rig together without an instrument approach in changeable vis, or your police helicopter on a snowy pinnacle next to another (where this is an accepted technique to maintain a reference point). These guys do it routinely, and it seems one got it a bit wrong (law of averages), thankfully without fatal consequences thus far. Just saying - no need to string him up for it, we all have the potential for mistakes and one would hope that we could show a little more consideration rather than throw stones.