I totally understand your point and appreciate you linking those resources, however I think it's important to remember that the author's post is from a personal blog, not from a scientific journal or arxiv.
Perhaps OP would've never posted this if he felt that his "contribution" wasn't novel enough. Additionally, there's a chance that the wording and tone the author used might speak to people who found the articles you mentioned opaque(and vice versa, obviously).
If the author, feeling the urge to write something up, had looked very hard for "prior work" instead of following the flow of their insights gained through experience, perhaps they would've felt compelled to use the same vocabulary as the source, which has its pros(forwarding instead of reinventing knowledge) and cons(propagating opaque terms, self censoring because of a feeling of incompetence in the face of the almighty researchers).
That's one of the great things about blog posts: to be able to write freely without being blamed for incompleteness or prior art omission.
On a different note, I think this may also highlight the fact that the prior work you mentioned isn't easy enough to find. Perhaps knowledge isn't circulating well enough outside of particular circles.