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There is a third toggle for connectivity checks. It can be set to Google or disabled completely.
We can also disable update checks as well.
That is for people who really don't want to stand out as different. Not many people have this threat model. But some do.
So you can basically switch all of these specific services back to Google. The two main use cases would be for availability in case graphene goes down, and for severe threat models in which some malicious ISP is looking specifically for graphene users.
These options don't hurt you personally. So why the crusade?