Not the original commenter, but he got me thinking. (I’d like to know what he soecifically meant too.)
However, I find that nuggets are often embedded in subsections of larger documents.
Perhaps the search could rank higher a document with subsection with query words in the title. (Maybe they do in some tools?) Any set of query words could be by chance present, but scattered in a hundred large documents not relevant for the user. Conversely the tiny specific subsection I’m looking for is lost in the noise.
This very thing happened when I was looking for the delivery and address information for a main office. Huge number of documents mentioning address of something and delivery of something showed up. I even remebered seeing an earlier revision of the subsection I was looking for, but it didn’t help. IIRC even adding parts of the street address didn’t help because the plain address was common in many documents for random reasons.
Personally I also like to divide my technical documents into subsections with exact titles. It would be great if tools knew how to exploit this kind of hierarchy.