every company will have pilots who get seriously stressed when going into the simulator which sadly results in them underperforming. It is a hard fact that such individuals are probably not suited to command and it could be argued that they
should not actually be flying commercial aircraft
He has said that usually he doesn't have a problem in the sim, but with the prospect of command in the offing he finds the stress very hard to deal with. This situation is a one-off, the culmination of a career and the pressures are extraordinary. I don't think it has implications for general fitness for flying and the suggestion that it has simply piles on the pressure.
QDM