Meta/Facebook preinstalls an app called Meta Services (previously Facebook services) on a very large percentage of android devices (I’ve never used one without it) and while they claim it helps updates and synchronisation between different meta apps, it is very suspicious. Why preinstall it on devices of people who will potentialy never use a single meta app?
Go to your app list/app management and show system apps and find anything with the words “meta” or “Facebook” then turn off network access for those apps (if you can) and disable them. (eg. Meta app manager, Meta app installer).
https://www.askwoody.com/forums/topic/meta-services-an-android-app-or-not/
https://fixyourandroid.com/about/facebook-app-manager/
https://www.reddit.com/r/GalaxyS20FE/comments/ttmx4t/meta_services/
Edit: Looking around I have found several people complaining that this app is using their ram for 10 hours a day even though they don’t use anything Meta. That’s even more suspicious.
I think the point is that such a vanishingly small percentage of people know how to do what you suggest (or care at all about privacy yammering) that it’s irrelevant to society’s overall privacy.
That’s okay though as long as that small percentage stands up and does something. Because it only takes 1 person to start a lawsuit about privacy, than everybody benefits if they win!
Not only that but it creates a sentiment and more people could be like hmmm… how do I do what I can to protect myself