My main concern with putting ex-bush pilots in a 139 would be whether they had a strong background in night flying, which many don't have. Particularly for the EMS/SAR role where you really need to have it all together when operating at night.
BTW, I never gave anybody a double gen failure in IFR...so whoever did that to you probably thought you were doing OK up to that point and decided to crank up the heat more than usual.