When you let engineers run around doing our own thing, we never have to show that the work we're doing is the most productive use of company time. We just have

When you let engineers run around doing our own thing, we never have to show that the work we're doing is the most productive use of company time. We just have to show that it plausibly could be. Nobody will hesitate to reward the well-liked engineer with a cool sounding project, even if other things would really be more important. As the author noted, Scrum solves this problem by making number of story points completed the primary tool for a team to measure its productivity. If the cool-sounding project isn't important enough to take other items out of the sprint, there's no way to offer a post-hoc justification for doing it anyway. It has no story points, so work on it is considered non-productive.