Comment by depr

You do have a point there. I did forget about the [-].

However, I read the comments in hopes they are interesting. If we have a culture where the "I don't know what this thing is"-type comment is popular, people will post those comments more and more. This leads other people to spend their time replying to it, instead of engaging with the content of the article. In other words, it distracts other commenters, who might otherwise have contributed something good.

Second, I think having low value comments is undesirable by itself. We could all start posting "First!" on articles, and everyone who hates that can simply minimize them. I think you can see why that would not be great. We can argue whether this is a low-value comment but I already did that in my original reply: it is not addressed to the article author (in this case they happened to show up but generally they don't) so the complaint doesn't lead to anything, and the comment complains about having to read about a concept they are not familiar with, but does the exact same thing itself.