This is not an "Americans" thing. This is about the community of programmers in general growing at a very fast rate, and many people not having formal education, and formal education not always giving people the real world skills they need.
It's true that OCaml is a mature language, it's also quite stable considering its age. It has lots of relatively mature project, but it's also missing some pieces that people expect from the ecosystem of a language (the "recent" post about Darklang moving away from it because of a lack of Google Cloud libraries is an example of that).
"tends to have a ton of documentation" is wrong though. OCaml users are not blind to their own flaws, and often point out themselves that the documentation of most libraries is basically "look at the code".
About the blog post you posted, I think you're misinterpreting what people say. It's not about asking the OCaml community to put in even more work than they already did. They don't owe me anything. They don't owe a new user anything. That's a fact. However, when you're picking which language/ecosystem to invest time in, you're going to compare them. And when comparing them, you'll see that other ecosystems may have more libraries, libraries of higher quality, better documentation and/or more help for beginners. Just like the OCaml community don't owe us/me anything, I don't owe them anything and I'm free to chose whatever aligns the best with my interests.
What you interpret as "expecting a ton of hand-holding" is actually "being explicit as to why you choose something else than OCaml". You could then argue that OCaml users don't even want us and that saying this is useless. But that's not true. Here's an example of a subject in the official OCaml forum where they actively express their want for new users: https://discuss.ocaml.org/t/expanding-ocaml-appeal-to-future....