Yes, it’s too bad that we don’t have more control over this as administrators.
Each user has to login & control their own notifications for each record. They can turn off their own notifications on a record-by-record basis (or disable notifications completely for their entire account), but we can’t turn off their notifications for them.
This is similar to form notifications as well — each user can decide whether they want to receive email notifications for form submissions, but administrators can’t set it up on behalf of team members.
I would email firstname.lastname@example.org to let them know that you would like to see improvements in these regards.