Pilots are experts and just super knowledgeable about everything.
How to run an airline better than everyone else, kinda goes without saying I suppose.
Economics.
Government.
Epidemiology.
And now, supermarket supply chain management.
Pilots come from all sort backgrounds, I have worked with pilots who have who have experience in all those fields except for Epidemiology. ( but I have meet 2 pilots who have become Drs.) I even have experience in one of those fields. Unlike a lot of other industries where people tend to go to Uni then work in their given field their whole career Pilots tend to come from a broad background of experience. There are also professionals in other fields who have an interest in aviation and post here.