Robbiee - the whole point of the exercise is to highlight that even if you are not firing on all cylinders when you set off to scud-run - you can recover the IIMC nightmare if you have been trained to and then use the correct techniques. I have used the same process for deliberate entry into IMC and IIMC in some stressful SAR scenarios - it works. And it works in everything from an unstabilised Gazelle through to a 139.
Well my point is that, "get the job done itis" has a way of overriding training, experience, all those fancy toys you put in your aircraft, and whatever is left of what we used to call common sense.
I have absolutely no idea how to prevent these types of accidents.