They don't know how to run an airport tho-they know how to run an airline. Surely totally different? Crewing an a/c is totally different to managing franchises with restaurants and setting landing fees? Obviously yeah they have a good understanding and would know how fees and charges affect airlines but as for owning an airport....?
Mhhh, lets see....Mr.Branson knows how to run an Airline, a record label, a mobile telephone company, a soda company (virgincola) and what not.
He surely will know one or two things about running an airport. No Rocketscience involved.