I think that characterising a (clearly knowledgeable, well-referenced) account of frustrations - especially ones that do not occur in other languages - with the dismissive term "snowflake" is exactly where the stereotype of the "smug Lisp weenie" comes from.

I have used and loved Clojure for years now (I wrote the patch that made Clojure vectors implement java.util.List, back in the pre-1.0 days). The fact that these problems exist doesn't itself give me existential worries about the future of the language. The fact that almost every Twitter thread in the OP, and the parent comment, contained this sort of dismissive reaction makes me very worried indeed.

If we replicate the community of Common Lisp, we will end up replicating its level of industry adoption.