> "Very few children of billionaires become notable people themselves" First, billionaires represent an extremely small minority of the human population. And s

> "Very few children of billionaires become notable people themselves" First, billionaires represent an extremely small minority of the human population. And second, notable people also represent a small minority of the human population. So it seems reasonable that there are few notable children of billionaires, and this alone doesn't imply that billionaire offspring are less likely to be notable than the person. It only suggests that being the offspring of billionaires doesn't radically skew the probability of being notable.