Nick,
From your accident data two things jumped out at me....the number of Mid-Air collisions and the single engine vice multi-engine accidents caused by engine problems (failures).
An observation on the CFIT numbers....how many of those were 206's that caught in IIMC events and were not "controlled" flight crashes but were loss of control accidents?
The usual accident noted as impacting man-made structures are tail rotors being stuck into things or striking the deck edge on landing or takeoff.
If you think the Bob Suggs/Beaudreaux concept of offshore operations is going to change in our life times....you need to change your brand of morning tea. Cheap is good....and they have been doing it that way forever. As long as oil field workers and pilots are content to jump into a Jetranger and ride all over the Gulf of Mexico then nothing will change.
When your brothers in the FAA start cracking down on safety issues and the oil companies get over the "cost of doing business" attitude they have towards the loss of lives in helicopter crashes, all this might change but not before then.
The American Helicopter industry is giving the customer exactly what they want as it is.
Think about being the CEO of one of the Big Two helicopter operators in the Gulf of Mexico and know that each year you will lose at least one pilot if not more due to crashes. I don't care to consider being a CEO of a major EMS operator with their accident rate of the past few years.