Perhaps it's worth stressing organisational factors in productivity.
Often when you find someone who's really good at what they do, they're the type of person who loves their work, and they've managed to find employment in an environment that suits them. The two are of course mutually helpful.
Also keep in mind it can be very hard to find more than one space for such a person. It's like how certain soccer teams are built around a particular star player; everyone else plays to suit that guy, and it would be hard to fit a clone if you had one. Others may well be suited to a star role, but happen not to have landed the role. Watch the Tour de France to see what happens when the lieutenant steps up to the captaincy. I can often be dramatic.
Often when you find someone who's really good at what they do, they're the type of person who loves their work, and they've managed to find employment in an environment that suits them. The two are of course mutually helpful.
Also keep in mind it can be very hard to find more than one space for such a person. It's like how certain soccer teams are built around a particular star player; everyone else plays to suit that guy, and it would be hard to fit a clone if you had one. Others may well be suited to a star role, but happen not to have landed the role. Watch the Tour de France to see what happens when the lieutenant steps up to the captaincy. I can often be dramatic.