The essay’s thesis is “most people don’t consider Lisp because they don’t know what’s different and special about it”. I think that’s unarguably the case. You equated that with “everyone else is stupid”, which is uncharitable and not at all what the essay says. Why would you even bother to write an essay if your audience is too stupid to understand what you’re saying?
Is it really that uncharitable? Yes, it's slightly hyperbolic, but I argue only slightly. Whether intended or not, the tone of the article is patronizing. Here are some examples.
> The programmers who live in Flatland
> Likewise, you cannot comprehend a new programming dimension because you don’t know how to think in that dimension
> the sphere is unable to get the square to comprehend what “up” and “down” mean.
All of this is patronizing. It implies that I am incapable of understanding the benefits of Lisp. If only I were able to lift myself out of the dull swamp I find myself in! But I am capable, and I do understand them, and I still don't like it! And I think most Lisp detractors do as well! I would argue that it is the Lisp proponents that live in Flatland - they need to understand that there's another dimension to criticisms of Lisp that aren't just "I don't like parentheses" and that there is substantive feedback to be gleaned.
> they need to understand that there's another dimension to criticisms of Lisp that aren't just "I don't like parentheses" and that there is substantive feedback to be gleaned.
I'm also somewhat reminded of the decline of Perl and how some people who love and still frequently use Perl don't really seem to even acknowledge the complaints people have about it, which seems to prove the claim about the decline being cultural. According to that kind of attitude, the lack of popularity is inexplicable, and we might actually be lucky that they're not resorting to conspiracy theories to "explain" the mismatch between their preferences and observable reality.
The Haskell motto of "avoid success at all costs" seems a lot healthier, as in, they know they might need to choose between going mainstream and getting to keep a language that suits them personally.
Lots of the Lisp advocacy also comes off as either entirely too vague, like this blog post, or stuck in the age of the `worse-is-better` talk (1989, so predates WWW and nearly all the programming languages in widespread general use). I don't care about comparisons to C, because the only places C is seriously considered for new projects these days are in places where a GC is unacceptable (and purposes Rust isn't certified for or whatever).
