Really, flying a plane isn't terribly complicated, I hear landing requires skill but not smarts.
I am neither an expert in flying one of the commercial planes, but I am going to say your really underestimating this one. It might seem simple to you, but fire up one of the simulators and let's see if you hold that point. With lives on the line, the risk vs. reward is . They barely pay the co-pilots anything as is.
The decision doesn't have to be logical; it was unanimous.