I am a bit surprised that architects would have such a big involvement in such a project. You wouldn't hire an architect to design a factory production line or

I am a bit surprised that architects would have such a big involvement in such a project. You wouldn't hire an architect to design a factory production line or a freight terminal. An airport has much more common with a complex industrial site than a traditional building. And at this scale everything is an engineering challenge that needs a specialist to do properly.