For those saying how obvious it is for us to mandate two pilots:
Should buses have two drivers? A large bus carries about as many people as a small plane. And per distance, road travel is > 100 times more dangerous than air travel.
References:
- https://journalistsresource.org/economics/comparing-fatality...
- https://www.theguardian.com/commentisfree/2014/jul/24/avoid-...