My point being that the accident happened in the mountains where flying IFR in a helicopter is not practical (I am talking real mountains - not Munroes). Those of you flying IFR at 3000' out and 2000' back on the North Sea (Batboy?) may wonder why an S-92 would have to land due weather. It is possibly because they were flying VFR and trying to avoid Cumulus Granite visually. When they couldn't they elected to land and it seems that is when the accident occurred.
I am not a S.Korea expert, but I believe Mt Hallasan is the highest point at a little under 2000m, which at around 6400' give or take, shouldnt pose too many problems for an S92 to reach MSA. So I think we may be 'barking up the wrong tree' with this line of argument. As we all know though there can always be many other mitigating circumstances, and speculation is difficult at best without all the facts. Prelim reports from Sikorsky however, claim no technical problem with the aircraft.