Comment by jltsiren

Lack of social status was historically the key. The guys who knew how to operate the ship had some critical expertise, but because they lacked the social status of nobility (or a college graduate), they were made warrant officers instead of proper officers.

Roles that historically required higher education – doctors, lawyers, and chaplains – are typically commissioned officers. Air forces similarly have commissioned officers doing the actual fighting. While they are not in management positions, their status and responsibilities are comparable to commissioned officers in other branches. In some cultures, the same extends to special forces.