But that's always how it works. A Kubrick, a Gates, a Bezos is one percent their efforts and virtues (without which there'd be nothing) and 99 percent being in the right place at the right time. Malcolm Gladwell (another example of this!) is glib but has talked about that in relation to the Silicon Valley titans: they were born at a historical moment, and were part of a small cohort (you mention four directors who didn't become 'Kubrick', not 4000) and among that cohort, their talent and effort lined up with good fortune.

You can say luck so long as you understand that ONLY luck won't get you this result. But among those with talent and determination, it's really fairly arbitrary who becomes the titans of art, industry, finance. You get good enough to meet the bar, and then it's up to Fate.

This is normal. It's more about what celebrity/stardom/ultimate merit IS, rather than what Kubrick is. It's a lot like internet virality. The pool of possibles is not large, but moderate: from that point onward it's luck and self-reinforcing prophecy. And again, you can't make a nothing into this sort of total winner because they must meet the bar first, they've got to earn their spot in the pool, but anyone in the pool would do as well.