Comment by FridgeSeal

Kind of ignores the risk externalities have on projects no? If you tried your best to deliver something, but another teams priorities changed, or the business/market shifted, or the project got bogged down in planning/politics outside of that team members control, or if the team needs to integrate with a system (external or legacy) that’s out of their control and is notoriously flaky and torpedoes their velocity and morale.