imo: They're just really good at driving outcomes for themselves.
That can be seen a selfish and often manifests as "that person is a jerk" - but if you follow along next to or behind them, you're in for a great ride with more often than not, good people.
I think if you live in America, this is lost on many of us and many of us have drifted into hyper-selfish, "i got mine fuck you" worldviews, and our communities have suffered for it.