Sas, I agree with all you have said there but
bad weather compounded by bad decisions and believing legal IFR currency confused as being IFR Proficiency is a dead certain killer of EMS crews.
giving the same poor decision makers NVG just invites them to push on further or go lower because they can see the ground. Then when it all goes wrong and they are back to IIMC it is still that lack of proficiency that will kill them.
Surely the need for proper IF currency and proficiency is the regulation that is needed here - yes it will require the operators to foot the bill but an hour a month per pilot is still much cheaper than a new helicopter and crew.