Upon setting up a new product, a creator must also manually select booking notifications to be turned on for the product. Furthermore, any future products set up must also have notifications manually turned on as well. This is often a looked over step with many creators as they become busier and don't always realize a notification of a booking was missed.
Creators have mentioned that it would be easier to initially have all of the team members notifications turned on automatically and for any who wish not to receive the notifications, can then be turned off manually.
As it is much more likely for a seller to only need to unselect a specific event or email 1x to not receive notifications than the likelihood of needing to turn notifications on each time.