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?

I like clothes. When flying was a bigger deal people would dress up. With the democratisation of air travel, nobody does any more. Still, in my head it’s an “excuse” to dress up due to the old etiquette. It feels good to me to arrive at a new place and look put together while I’m at it.