I wonder if people are aware how turgid and impenetrable is their prose.

Does the person who wrote this understand that they are incapable of communicating effectively? Do they do it anyway to prove some kind of point that is tangential to the main one? Is there some sort of secondary gain involved in being unclear?

In short, is the author getting some sort of self-aggrandizement out of explaining things poorly, or are they just incompetent?