Knowing Google better means better SEO
1. Google is a champion of the people
If your website is not meant for the people, it is not meant for Google.
2. Google Income Generator
When Google places a website in rank 1 for a certain keyword or keyphrase, they are somehow endorsing that website. They do not want to endorse any website for wrong search terms, meaning that they want their search results to be as close to perfection. This perfection allows them to sell PPC.