[deleted] There is a book "extreme privacy" by michael Bazzell. He tells his readers to install Fdroid as an alternative app store instead of google. He also tells readers that he recommends not to install sandboxed google play services because it "defeats the purpose of de-googling."
Having not read the book, but just a synopsis and his bio (US Marshals, advisor for Mr. Robot S01, etc.)... I'd say his audience is indeed looking for "extreme" privacy.
I always ask, "Privacy from whom?". If your your threat model includes not only 3rd party advertisers, the big tech companies, but also law enforcement... then you'll need such "extreme" practices described in the book.
Sandboxing Google services is enough for most people. It increases privacy from Google itself, since the google apps run without special permissions. But Google will still be able to identify you in the normal ways that law enforcement and/or criminals would care about.