Being able to install whatever one wants on their phone is a notable starting point. Any Android phone allows that out of the factory; no need for self compiling. Google services don't even get in the way.
It is for privacy purposes. Obviously, there are other services that communicate with Google without an account, like AGPS and (on Google phones) OS update checks, but unlike on iOS, those can be disabled — no recompile necessary.
They don't track you any more than they track you on iOS, which is the point. Sure, if you use Google Maps, your location will be sent to Google even if you aren't logged in, but on Android, it is possible to use an offline maps app and set that as the default (and never use Google Maps), which is not even possible on iOS. Even if you are an iOS user who is fine using an offline maps app that isn't the default, every time you get your GPS location to show where you are on the map, that GPS location is sent to Apple. On Android (even Google devices) there is a checkbox to disable sending it to Google shown during the setup process.
What are you off about? The claim is that "refraining from logging in could be even remotely sufficient to prevent your data from being sent to Google."
google.com has 90% marketshare. Google Analytics is on 55.9% of websites (according to Google!) They track every user on more than half of websites on the entire Internet.
Why are you rambling about the default settings for the built-in maps app?
Because the erroneous claim is that Google tracks users more on Android than on iOS and that you need to compile your own Android to stop it. Why are you rambling about websites? Compiling your own Android won't help you with that.
