SEO = Search Engine Optimisation...Google is the search engine, and they want you to optimise your websites to suit their needs! So yes, they want you to do it, but what we want is money and sales and google doesn't care much about that...
Also, G doesn't really care about user experience, they just want to be the most-used search engine in the world, and the way they do that is by providing the most "useful" content. So basically, we work our asses off to give them great content so they can make BILLIONS from it. Yay.