I'm addressing the bit that I quoted, saying that an interpreted language "must" have valid semantics for all code. I'm not specifically addressing whether or not JavaScript is right in this particular case of min().
...but also, what are you talking about? Python throws a type error if you call min() with no argument.
There is only one mention of Python being slow, and that's in the form of a joke where Python is crossed out and replaced with "the wrong tool for the job." Elsewhere in the post, Python is mentioned more positively; it just isn't what's needed for the kind of gamedev the author wants to do.