For a medical device project I agree that the manager must provide the balance of executive deadlines and taken into consideration the overall safety of the users. However, the role of the manager should not be limited to a business aspect. In my experience a manager is most effective when they have technical expertise and experience in the specific project/role they are managing. Throughout my time in industry I have been on teams in which the manager does not have this technical background and it results in many issues arising during the project because of lack of insight, which could have been avoided with experience.