One can of course lay the blame for all of this squarely at the door of CRM.
Many will know the story of the ancient Captain, rumoured in this case to be Dan Air who, on being told that he would have to undergo a CRM course expressed the opinion that such training was unnecessary for him.
In the matter of first officers he was quite clear. He never let the little so so's touch anything in the cockpit below 10,000ft.
Thereby he no doubt placed a somewhat different interpretation than was originally intended on the concept of a sterile cockpit.
