Because they're not used to reading lisp?
I read these articles with Go or Rust code examples and just tune out because I don't use either of those languages so don't know enough to extract the wheat from the chaff, as they say.
Hell, I don't even know scheme enough to read/write code without having to look up the syntax and I've been hacking on a scheme interpreter off and on for years.
Something about different strokes for different folks...