[good_gnu]

The purpose of all the jargon that Scrum introduces is to avoid naming collisions with prior terminology.

You probably have a good idea of what a product manager should be doing but someone else in a different company might have a different opinion. Introducing a new term eliminates this source of confusion.

Admittedly, all the jargon you encounter when learning about Scrum can make you feel like you're joining a cult. However, there is a reason behind introducing it.