I have been surrounded by some of the smartest, brightest, most caring lawyers, by agents who are willing to risk their lives for others, by support staff that are willing to work as hard as they can.
I would say that IQ is the strongest predictor of which field you can get into and hold a job in, whether you can be an accountant, lawyer or nurse, for example.
I'm afraid I talk a lot, too much, perhaps. I should have been a lawyer or a college professor or a windy politician, though I'm glad I am not any of these.