This is the point, though. You call it “distracting the scrum”. I say developers, UI designers, UX designers and testers can’t build good software unless they personally have knowledge of what success looks like. It’s not distracting them, it’s literally the information they need to deeply internalise in order to make the right thing. I don’t care how brilliant the product manager is; if the team does not understand the business success factors — and the only way to understand is to work them out yourself, a spec document has never once in history given someone enough information to choose the right solution — then the team will build the wrong thing time and time again. The wrong thing could be the wrong technical implementation or the wrong UX metaphor or a bloated feature set or a myriad of subtle mistakes that will cost the delivery team time and pain the future. This is the point of my article.