I think the main crux of the article is ultimately dependent on the one thing he mentions at the very end:

  It goes (almost) without saying that the only reason I can
  afford to be non-technical is because I’m surrounded by a
  bunch of geniuses.

His points are valid, but if you're a single non-technical founder, it can often be hard to even know whom to surround yourself with if you lack the ability to evaluate them in the first place. This point is not made very apparent in the article.