The common thread is "work hard", not "be smart", but people obsess over intelligence/natural gifts, and consistently underestimate the "ditch diggers".
Jobs was a ditch digger.
Gates was a ditch digger.
Musk is a ditch digger.
PG is a ditch digger.
Tao is a ditch digger.
Jordan was a ditch digger.
Woods was a ditch digger.
Carlsen is a ditch digger.
Some (all) of them also are naturally gifted, but their success is due to their ability to "work hard", or at least that's what I've read them say over and over again. Maybe I and they are all wrong about it, I'm open to that possibility, but theres a consistent theme that every successful person I can think of repeats when asked, and it's some variation on "work hard".