Sometimes, yeah. Comedy is one such example: it gives huge rewards to a few celebrities, while a lot of other equally talented people just never manage to be in the right place at the right time.
It's perhaps especially true for comedy. You can see it when you watch a comic on TV: they're much less funny than in person, because you're not surrounded by a lot of other laughing people. The same routine by the same person can get little more than snickers when done at somebody's open mic night -- unless somebody recognizes that they're famous. Celebrity reinforces itself.
Burnham is very talented and I'm sure he worked like crazy to market his work. But he will also tell you the names of a hundred others who are equally talented and worked equally hard, but you've never heard of them. The market for celebrity is very fickle, heaping huge rewards on a few, but drop off rapidly for people who aren't in the hump of the long tail.
Warren Buffett isn't profiting from celebrity in the same sense, but there's a similar effect where the biggest winners are lucky as well as smart. Their advice often doesn't take that into account, and it's important to measure that in your appetite for risk.