Why Do We Need Project Management? 

That's such a good question, and one that holds people back from moving sectors. In my opinion, they need very little subject matter knowledge to begin with so long as they are surrounded by experts, are comfortable with being the least knowledgable person in the room, and to learn fast. Within a few weeks they should ideally be in a position of knowledge where they can read and understand a book on the topic of the subject, but not need to so informed they can write the book. Their strengths need to lie elsewhere. But that's just my opinion - and it's why I managed to move from government to health to banking to fintech to retail and then to insurance.