I don't see how it doesn't help. It might not help as much as could be asked, but it's a cute example of "real world" Haskell use and he described the parts of it he rather liked.

Here's a follow up post from a different author, that continues on this subject, and also explains some of the benefits of the haskell approach: http://nikita-volkov.github.io/a-taste-of-state-parsers-are-...