even the yanks don't hide HT cables at 30' in treelines do they?
Yes, they do. And as noted above, even a cable TV or telephone line stretching more than a few feet will have a steel wire supporting it, to prevent stretching and breaking. And
any wire can destroy a helicopter, and has. Hit it with the skids with forward speed, even a small telephone line, and your day is done. Wrap it in the pitch change links, and your day is done. Even if you survive uninjured, the patient has no ride, and the company is out hundreds of thousands of dollars or euros. The odds of hitting a wire are orders of magnitude higher than those of an engine failure. But all said and done, you fly approaches your way, and I'll fly them mine.