The point is that it doesn't help to know that it was a pilot error, because a pilot is human, and humans in the same situation might make the same mistake - and the main goal is to prevent accidents, not to have accidents happening all the time and saying "it was again human error".
It boils down to:
1 - Was the "error" intentional? If so, how to prevent someone from doing it again?
2 - Was it a real error, with no intention of any kind? If so, how to prevent that someone makes it again?
It boils down to:
1 - Was the "error" intentional? If so, how to prevent someone from doing it again?
2 - Was it a real error, with no intention of any kind? If so, how to prevent that someone makes it again?