It’s just a helper. It’s a way for your calendar to ask “uhhh… Should I already know of any calendars…?” and the service going “oh actually yeah, the user configured their email account, hold on, here’s the corresponding calendar”.
That’s just basic functionality. Maybe what’s tripping you up is that it’s a separate service? Because I assume you have nothing against inputting your email into a mail client and a calendar separately.
If so, then for one, it’s not really a difference if the mail app stores this into or the service does; and second, it’s a good thing to have this standardized into a single purpose built service, rather than having each app reimplement this stuff.
CPU and RAM usage is so negligible it’s laughable.
IDK.
It seems like you read something about personal data in the service description and just jumped to the conclusion that this is something nefarious.







They saved lifes.
Glad to have cleared that up for you 👍