Hi Niknak
The fact that the crew should have done XXX is not the end of an investigation, but rather the start of one.
Obviously there are many escapes possible from an incident or an accident therefore we need to manage the risks involved, understanding these risks comes from knowing all factors involved. Without understanding there is not going to be much managing.
True the crew should not have done this, but I doubt that they would now claim that they will do it again, so they have learned. The question is have FR? They still have no idea why this qualified (by FR) crew made such a F... up. With their attitude they never will know and some day they will be too late.