I would also suggest that training has a lot to do with it.
Minimum required training for Part 135 is 5 hours on type, and that's all most folks get. No simulators for most of the machines (or at least no reasonably priced, easy to get to simulators). The result is that folks with complex, all-electric helicopters don't know and understand things like the AFCS / autopilot.
Next, there is no good IFR training in a non-IFR helicopter unless you go to a lot of trouble to put in vision-blocking equipment. Foggles just don't cut it when there are chin windows and side windows that go down below waist height.
And there is no such thing as night VFR unless you're over a built-up area.
I could go on, but these are just two of the things that should be re-considered for improving safety.