Stark
If you had lost an engine while the 3 idiots were not in the cockpit
The autopilot would have probably disconnected and you would be dead since 1970 as well as all people's on board
All airlines have a policy that you need to have a valid pilot license and a type type rating in order to occupy a pilot seat. It is not very complicated to understand.As well as since 911 most if not all the airlines have a policy that no one is allowed in the cockpit while in flight excepted peoples with an approval . in Japan the cockpit door have to be close and locked before boarding. So each pilots have to follow their airlines rules and if you d ont you have to accept the consequence
When people's are paying and flying in an airplane they put their trust in the crew and this is the responsibility of that crew to act professionally