This is a fascinating analogy of how the brain works.
Even now, the brain continues to be a mysterious organ and we only understand such a small amount about how it works.
I like the idea of our brain in comparison to an airport - it certainly helps you appreciate how difficult it can be for a patient with a brain disorder when things are not running smoothly!
In my research we mostly use brain scanning to map how different parts of the brain are connected to each other. For example by mapping the bundles of nerve fibres that carry information through the brain we can find the nodes of the network with the strongest connections, or the most connections, and so find key "hubs" within the brain. You can think of it by comparison to the global airline network. A few airports, like London Heathrow, have many more flights and more long-haul, intercontinental flights than most other airports. These are the hubs of the airline network and it turns out that brain networks are a lot like airline networks, in the sense that a few hubs of the brain network make many more connections, and more long-distance connections, than most of the other regions of the brain.