Do we need one person to understand everything? I don’t believe so, but there could be limits to the efficiency of collaborative understanding and action on co

Do we need one person to understand everything? I don’t believe so, but there could be limits to the efficiency of collaborative understanding and action on complex systems, such that we have to have one person understanding multiple systems. To play devils advocate, I see this in science all the time where the great insights come from people with deep knowledge in multiple areas.