Wrong either way. Because it is so easy to parse by computers it is easy to use them to format it. Have you tried reading foreign (as in not written by anyone you know) lisp code? IME It is not hard(er) than any other language.
For example, IME delving into the codebase of hunchentoot was way easier than django's.
All of this stuff is subjective. I've coded Python for some time, and I've done an entire project in Clojure.
Because I've done more Python working, reading Django's source is much easier for me than most Clojure code (even my own), but that's not to say the same for everyone else.
These are after all languages (even if they are artificial). The human brain is really good at understanding a wide variety of linguistic constructs, the main issue is familiarity and that changes from person to person.
For example, IME delving into the codebase of hunchentoot was way easier than django's.