Usually it comes down to writing flow and organization rather than the topic itself. Clear sections, normal paragraph spacing, and a more conversational tone make reading much easier. People are already overloaded with information every day, so texts that look too artificial or stuffed with keywords become tiring very quickly.

Another important thing is pacing. Articles feel more natural when ideas move gradually instead of repeating the same point in different words. Mobile browsing also changed reading habits a lot, since most users now read from phones during short breaks rather than sitting for long sessions at a desktop.

In general, readability probably matters more now than many content websites realize.