And he covers this with the rhetorical question: They can do these things, but they don't, because being as anti-user as possible (while putting out the occasional fluff PR piece) earns them billions and billions and billions of dollars.
He's basically saying "Google could remove advertising and figure out how to make money without being one of the most user-hostile organizations in software history, but they don't because their hostility to privacy and their revolution in combining aggressively curated private data with advertising has made them one of the richest corporations in history"