Well I'm afraid the investigator is thoroughly wrong. Not only were the actions of the pilot incorrect, the fact is that he didn't do "the best he could", or "make the best decision available to him at the time". That would have been to keep the aircraft under control until contact with ground or water was inevitable. He broke the most fundamental disciplines of flying.
He may have been "under stress", but pursuing a career as a pilot is an acknowledgement that you not only understand that there will be moments of severe stress, but also have trained and prepared yourself to the point where you are up to the task.
There is a standard, and if you can't cut it you shouldn't be flying with passengers. Having met that standard is an acknowledgement that you are prepared to answer for your actions if you fail to exercise the care and responsibility expected of you.
It is not an "accident" that this guy chose perform a steep turn, at low altitude, towards high ground. That was a deliberate action, and as the investigator said, was the reason the accident happened.
It is bad enough when friends and colleagues try to sugar-coat the actions of their peers, but when investigators do it, you might as well forget about improving flight safety. The message from this investigator is "it could happen to anyone", which is patently untrue.
Nobody likes it when people die in air accidents, but if we also refuse to call a spade a spade, we are only deluding ourselves, the loved ones of those who died, and the entire pilot community.