I have no particular opinion on the "what's right for beginners" part of the article. Regarding the rest, I'd add that these constructs serve as idioms in a general sense, as well as serving as social mores as described in the post. I would add that they have a third, related use (and are an example of another language construct): a shibboleth. Using these constructs indicate that you are part of the group, and (perhaps more importantly) that you've read the docs/canonical material [books, seminal posts] that the group considers important. Whether you consider this a good idea (I do, but with the understanding that it is imperfect and comes with caveats/should only be considered a starting point) likely depends on perspective on such things, but I think it's valuable to understand it.