The last 30 years has been about taking the pilots out of the cockpit..massive automation, redundancy, gear that does the navigation and situational awareness. Combine with your typical airline pilot doing the same route, same canned flight plans, same approaches, same airports everyday for three months means that he doesn't make a decision, nothing new is thrown at him.
It's the reason why they can put kids in the cockpit, the gear is doing all the work.