II I hear you and you are of course right. However this kind of accident is not unusual and happens a lot more than we think around the world.
My last count I have 27 serviceable helicopters impacting the sea!!
Why does this happen and how can it be prevented?
Modern machines like the EC225 and EC175 have Flight Envelope Protections built into the DAFCS. Even this did not stop one hitting the sea when the crew decided ( because they are allowed to) fly manually in the dark.
It's a very poor response to try and blame these accidents on the individuals alone. They are, for the most part, simply guilty of poor airmanship that leads to the accident. It is much more relevant and progressive to try to understand what processes, procedures and equipment could be deployed to prevent these accidents.
DB