It's some combination of survivor bias and sampling bias: people who are reasonably "rebellious" (in the good sense of the word) and ambitious are more likely m

It's some combination of survivor bias and sampling bias: people who are reasonably "rebellious" (in the good sense of the word) and ambitious are more likely moved to US in the first place, and successful people are of course likely tend to have more of those trait. Although I wouldn't call successfully climbing the corporate ladder to be much of "challenge authority" ...