That’s a good question. We initially designed this flow so that it can be plugged into early site onboarding stages when it’s appropriate to invite another admin to help with site setup and configuration. To make this admin invitation experience more convenient and predictable for both parties, we decided to extend this to grant moderator status automatically. So the email flow is a side-effect of that decision.
Thank you for the mockup! The suggestion to make it easier to invite a moderator using the same UI is good, and we might look into that once we shift more focus from the initial admin experience.