Arubicus, you are wrong.
I can with confidence say that there are some pages out there that are not useful. Wait there are really very few absolutes, so I will say that there are pages that are useless to most people except the guy that made it, google for taking a cut, and the one advertiser in a million that might get a conversion from the clicks.
To make it clear, I am talking about pages with nothing but "filler" sentences between keywords such as "This page is about" "We hope to bring you all the information on", "A lot of people have come looking for" etc.
By the way, I just checked and found some of my content lifted by a "publisher" that had created a page of about 1,000 words where 600 of them were "widget". And yes, he was running adsense. IMHO, this page has no content as it was nothing but gibberish nonsense with "widget" every other word. Of course 400 of these widget words connected to the other 400 similar pages he created.
The issue is not black and white, but some sites are clearly out of the grey area.