I'll never understand the obsession with LISP. My guess is it just appeals to a certain type of person, sort of academic in my view. I'm not convinced that LISP was ever the-right-thing. The author didn't express anything about LISP vs C except to assert that C was a 50% solution and LISP was better. I agree though that for practical purposes, practical solutions are just going to be more successful.
Then a righthanded person picks up the lefthanded scissors and deems them weird and uncomfortable. Which they are .. for the right hand of a right-handed person.
Other popular examples of such taste controversy are Python's semantic whitespace, the idioyncracies of Perl, the very unusual shape of J/APL, and anyone using FORTH for non-trivial purposes.
edit: https://news.ycombinator.com/item?id=41766753 comment about "other people's Lisp" reminds me, that working as a solo genius dev on your own from-scratch code and working in a team inside a large organization on legacy code are very different experiences, and the "inflexibility" of some languages can be a benefit to the latter.