It is well known that the exchange rates offered by airport currency exchange windows are poor - see these stories from the BBC for example: Holidaymakers hit as pound falls (20 July 2018) and Tourist pound now down at close to just one dollar (14 Dec 2018).
I have been aware of this for a long time, and for the last 15-20 years of travel I have simply used my card at the nearest ATM when I arrive. I am therefore amazed that the windows manage to stay in business. Is there something else that these windows offer the traveller to make using them worthwhile and therefore keeping their business viable?