So is having a rich family. The article provides a long list of examples of great artists who's success is largely enabled by already being wealthy, not necessarily being the best. Even just being lucky enough to already be established puts you far ahead of people trying to break in. I can walk out the door and likely find a job in my industry because I have lots of experience to point to and references who will vouch for me. I think I'm good at my job, but I was also in the right place at the right time to get it and now I'm a safe bet for someone who needs my skills, even if I'm not the best bet. Someone who's trying to break in that's ten times more talented than me might never catch that break. I know for a fact that I've hired lesser candidates because I needed someone who was a known quantity more than I needed someone who was possibly great.
Meritocracy is pretty far down the list as a factor of success in my experience.