The article seems to define genius by how socially popular the individual is? But that's a terrible metric. Is the difference between Einstein and a cutting ed

The article seems to define genius by how socially popular the individual is? But that's a terrible metric. Is the difference between Einstein and a cutting edge quantum physicist today marketing? He might be right in his conjecture that one-on-one tutoring produces 'geniuses' but this article contains no evidence of it. I don't think it even contains evidence the top intellectuals are less common, just that they're less popular.