Why does the calendar app require access to my emails?

I recently ran an update to Mojave 10.14.4, and following this update, I was prompted by "Internet Accounts" to re-authorise access to my Google account.

Notice that I only wish to syncrhonise Calendars and Notes in this panel, and not my Mail or Contacts. My concern is that, when I proceed to opening Safari and enter my credentials to authorise access, this is what the permission request looks like:

As you can see, the request includes full access to my email account. I have tried disabling the synchronisation of my Notes, but this does not seem to change the request.

It would appear then, that following the update to Mojave 10.14.4, "macOS" requests a blanket permission to my Google account regardless of my sync preferences. I would like to know why that is, and if there is any way to only give access to what I would like to sync, and nothing more.

A Google account, whether added for Contacts, Calendars, Emails, or all of the above, is added the same way and requests permissions for all three. You then enable or disable them on the settings panel you see in the background.

It will not interact with your email if you leave the Mail checkbox off