I've come late to this thread, so haven't read all of it. I don't care what people wear, or don't wear on the beach. I remember even as a teenager when I was in southern Europe there were notices asking people not wear beach wear, in other words a modicum of covering when visiting nearby cafes and restaurants. I can understand that not everyone wants to be confronted with other people's bodies in a state of undress. I think we should also bear in mind we live in a multi cultural world where some exposed body parts are frowned on by some cultures. Particularly, if abroad we shouldn't flout the rules of the the host country, and maybe, it's not unreasonable, apply those at home too.
Less can be more, but sometimes it can be too "more" in certain situations.
There are always nudist enclaves for those who want to go au naturel if that's their thing, but when out and about in public places not everyone wants to be confronted with acres of flesh.