Send e-mail operation triggers the 'After updating an existing user account' Event in Rules

I have a rule that fires on the event "After updating an existing user account".

And I have a VBO list that emails out to users, with only "Send e-mail" ticked.

When the emails are sent out, the Rule is triggered.

It makes me think that despite only sending an email, it must be triggering user_save, which seems redundant.

Steps to replicate:
1. Create a rule on event "After updating an existing user account".
2. Create an action you can see, I used "Show a message on the site".
3. Create a View page listing users
4. Add in the field "Bulk operations: User (User)"
5. Tick "Send e-mail"
6. Open the page
7. Tick a user and execute the "Send e-mail" operation
8. In the Recipient field, add in [user:email]
9. Add a subject and message
10. Click Next and Confirm
11. The Rules message will appear above the "Performed Send e-mail on 1 item."