> have access to virtually the entire internet
It isn't even close to 1% of the internet, much less virtually the entire internet. According to the latest dump, Common Crawl has 4.3B pages, but Google in 2016 estimated there are 130T pages. The difference between 130T and 4.3B is about 130T. Even if you narrow it down to Google's searchable text index it's "100's of billions of pages" and roughly 100P compared to CommonCrawl's 400T.