I want to be alone!
There's enough material here for a Phd in aviation psychology and not all of it "normal". Some of the commentators here truly look for the "loneliness of command". When it all goes tits up for them then they surely will be alone, very much so. I can't see any reason why a commander wouldn't use the brain power of everyone at his/her disposal to "work a problem". The buck stops at the commander's side of the aircraft of course.