Spot-on IMO. If the content is well written, it is much harder to rip effectively. The infringer simply cannot bring themselves to drop a beautiful, concise sentence, or a particularly well turned phrase specific to topic. They just can't - and then we catch them - because that is what we are looking for when hunting down ripped content; the stuff that is too tantalizing and tempting 'as written' to cut.
Good point on "longer than 3 paragraphs". Anyone with even minimal skills can rip this, slice and dice, and put up something perfectly acceptable (or better) with no problem. Longer articles require a lot more effort to rip without infringing. Unless skilled enough to write it without even needing the article, most people cannot do this. Not a question of not making the effort (which they usually do not) - they simply don't have the talent. A good writer, with a sufficient canvas, is really hard to rip. It's one of the 'unseen' results that we get paid to achieve.
<edit> Nobody owns any topic and there are innumerable ways to present a thought. Nobody's article is so unique that they own every expression of that content. </edit>