It's never problem if it's just about small number of people. When they track half of humanity, they can see all kinds of patterns that they, and other people

It's never problem if it's just about small number of people. When they track half of humanity, they can see all kinds of patterns that they, and other people can exploit. Let's turn your question around. If all this information is that useless and harmless why are all corporations and governments spending tens of billions of dollars acquiring and keeping?