WOW this is the first time someone has been able to finally make sense of the intent and explain HOW to actually use this! THANK YOU SO MUCH!
I would add that the guide also does not mention is whether or not this auto-assignment to tasks per the project roles can be leveraged AFTER the project creation from the template. It appears that is NOT the case though.
I’m adding additional detail to your other post on your Ability to assign Project Roles when converting a task to a project using a template thread 