The framing is obvious from the title of the article. It's a short article. Adding a bunch of context and framing would make the article worse.

The problem is that when an article gets shared on HN, people hold it to unreasonable standards of clarity and correctness... the kind of standards that are usually only achieved with careful editing. It's appropriate to level that kind of criticism at a textbook or a Wikipedia article, but the feedback is unwelcome for simple blog posts like this.

There's also a weird current of pedantry here, like "I understood the article, but someone else might misunderstand, and so the article should be clearer."