Organic search results only ever profit Google if they answer the user's question, because it makes that user more likely to use Google again and click an ad in the future. If a user searches something and the top result doesn't answer their question, then Google hasn't done it's job and the user is less likely to use Google again and therefore less likely to click an ad in the future.
Surely the most profitable option for Google is to answer people's questions quickly and easily, whether you think these questions are answered by Wikipedia instead of a business site targeted to answering that question is a different story.
I just don't understand how Google's goal of "answering people's questions" is somehow opposite to "providing quality" for users. I think for most of HN, they have a very narrow view that "quality" means antiquated wiki-type sites.