How do I deactivate email notifications for managers?

Wouldn't disabling the Role Assigned - Manager email only disable a manager email for that specific scenario (when someone is assigned the manager role)? My interpretation of this question is how do you remove the manager from being included on all the other learner-specific emails. The original poster used the Course - Self-Enrollment email on the Learning Activity tab as an example. I'd say the Course Auto-enrollment and Course Enrolled by admin emails are other better examples. When you click into that template, the Learner and Manager tabs tell me that this email will be sent to both the Learner and their Manager. But say a training is being assigned to an entire department, someone who managers 40 people would receive 40 emails about this? And this would happen everytime they enrolled or were assigned a any training. There doesn't seem to be a way to still keep that email enabled for the learner but disable it for the manager, unless I'm missing an option on that screen?