Exactly, there is a tendency among dynamic language proponents to think that programming in a statically type checking language is masochistic.

When that is all that was taken away from a detailed and well written technical article, it is easy to see the problem with language tribalism.

    That's a joke, son.
       --F. Leghorn

It also illustrates the danger for authors of leading with a joke at someone else's expense. All that effort to carefully explain the ideas, why they are valuable, and how they can be used gets collapsed into a religious dispute over type safety.

Considering the fair amount of FP stuff in Python in general, and certain parallels with Haskell in particular (not only e.g. comprehensions, but even the significant whitespace), the joke does not look snarky — at least, to me.