I have another similar funny example - whoever invented bitcoin, that person single handledly created more value than all the YC startups put together PLUS a lot of other incubators, plus a lot of other companies. I wouldn't be surprised if in less than 10 years, you could add to that the total capitalization of the FANG (as in F+A+N+G) and still that one person will have had created more value -- alone.
It takes some special persons, who have not just the wits, but A) know extremely well one or more domains that are generally not connected - say software, finance and game theory for Bitcoin, or software development, project coordination of thousands of persons and hundreds of companies, and scale/complexity issues for Linus B) has already played with the existing solutions quite a bit and know why they suck C) has the opportunity (free time, etc) to scratch this own itch.
I know, people will often tell how it's wrong, how both project are special exception, but then what about Fabrice Bellard? What about the many others? Are they all special exceptions?
TLDR: I believe Kx programmers have a statistic distribution with a very long tail. There are some K=10, some K=50, some with a K even larger. It requires multiple skills + motive + opportunity. Any missing factor and the magic doesn't happen.
Deny the existence of the 10x programmers if it makes you feel better about yourself. Use their existence as a source of inspiration if you want to improve yourself.