I could be wrong, but my impression is that wealthy businessmen are somewhat less willing to admit the role of luck than famous scientists are. Due to real differences in the role of luck in the two areas? Due to political considerations (the implications of admitting that wealth disparities aren't all due to merit are more political than the implications of admitting that scientific fame isn't purely due to merit)? Due to the self-deprecating scientists being humbler personalities? Dunno. And I could be wrong on the aggregate difference; I haven't done a survey or anything.