I'm still not sure I see how these helicopter accidents constitute an indictment of the EMS industry. In both cases, there was no patient onboard. Thus, the "pressure to perform" on the pilot was no greater than on any other commercial pilot. It could easily have been me taking off in horrible weather at night from a site landing in my R-44, or scooting low-level up the Potomac River at night. To my mind, there is nothing about these accidents that points to any peculiar aspect or hazard of the EMS mission.
And maybe the NTSB will realize that right off the bat. And maybe they'll go, "Gee, you know, flying helicopters commercially at night really sucks! They fly in bad weather and they fly routes that mandate ridiculously low altitudes...no wonder they crash a lot!"