People who dress "nicely" to travel through airports, why?

I get that some people have business waiting at the pickup and wanting to look professional, but why everybody else?

at the airport you also have higher chances to meet people from different countries and cultures with different standards for what is casual clothing. A fancy dress for an American is an outfit to go at the grocery store for an Italian or a French

The fancy dress in Italy or France is what Eastern europeans wear to go at the grocery store… hahahah Albanians and balcans too😅

True, but they are going to wear it with sneakers.