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.
The average person isn’t going to google an individual to find their blogs or whatever. The first stop is figuring out their social media destinations. You would hardly expect to find really anything about a person on Google that isn’t a link to their socials. Or perhaps an article related to some crime.
I guess I'm not the average person but, sure I would. (Though I might look on LinkedIn first especially if I knew their employer.) A Google search would presumably return social media handles among other things.