Or, say, fields which require processes which demand a good understanding of a defined structure and manipulation of it.
Ah, so when you say "I think it's that rationals perform better when their lives are regimented in some way," you're referring to the outside world being organised in some way which means that things can be, say, separated into democrats and republicans, and that you don't have politicians constantly changing or things moving in a way which makes it harder to predict.
I like Fe because Fe-egos are fun. *Shrugs*.