Earlier quoted context omitted.
The digital wellbeing app is pretty much spyware. If you disable Google Play Service, the Wellbeing app (which cannot be disabled) will constantly complain that it won't work properly... The app has, among other permissions, the requirement to have full network access. Similarly, if you use the default Gboard (keyboard) on Android, it's constantly trying to call home to Google servers, as with most other stock apps.…
Google Play Services are the crux of the implementation of core services. If you're not okay with that don't buy the phone or install something else on it.
I'll use a version of AOSP without the data harvesting spyware baked in, although Google seems to be keen on shutting aspects of it down.