This is a categorically false premise. The kind of statement that only makes sense when you're in a deep bubble and entirely removed from the average person's use of the internet.
Deliberately removing yourself from Google is fine for the author who is more concerned about taking an ideological stance than they are about being discoverable, but removing yourself from Google is terribly bad advice for anyone who wants to help people find their content.
Many people do use Google to find content and people, even if you don't.
A lot of tech people have started to use the trick of adding reddit to their query, since it is one of the few bastions of actual human beings talking in volume in the open web. But even that might stop working, if reddit decides to close itself to google, and the way their leadership is doing things, I wouldn't doubt it.