Are you speaking about yourself? LOL!
I'll never forget me and my parents in Cincy airport returning from DE. Instead of going through Customs, we were assumed to be German and were put in the wrong line. Actually, the same thing happened to me this past summer. I was on Tribal Land in the US and my Navajo friend asked if I was German. I realized later he likely meant the real deal and not just a descendant. My son says it happens to him regularly in Europe. Flight attendant assumes he's German, speaks to him in German. We all get a big laugh.
I do agree with you about packing light and laundry in the room. My same son was taught this at age 12 when he went to Australia with a group of kids. So sure, as long as I'm 2 nights in the same place, I can rinse out whatever I need.
My sis threw out her undies when she walked the Camino de Santiago a few years ago. However, I traveled more recently to Europe with Senior Citizens, and what is the saying? You can't teach an old dog new tricks? Yeah, there was lots of overpacking, belly-aching, and I can't recall, even at the time, who wore what. Of course, we wore the same jacket throughout the trip whenever we needed.