It's adding content worth reading! Putting the keywords in shouldn't be the central focus, it should be the central delimiting factor, sort of a support around which to structure the piece.
With all due respect that's a motherhood and apple pie answer. The point I was making was simply that SEO copy writing will reuse the full noun phrase more often than one would in normal copy writing. Your example of using the words in a select order even thought cleverly changing their parts of speech or separating them with punctuation is just more proof of my point.
I didn't say this was a good thing or a bad thing. I just said it was a difference between the two types of copy writing. One of the objectives of SEO copy writing is to achieve some degree of keyword density. Nobody can deny that. If SEO copy writers didn't do this they would simply be copy writers.