"Arty" is a derogatory term, which is used to belittle people who decorate their appearance with culture. For example, those nouveau riche who buy paintings and calligraphy are often called "arty". It can be seen that culture is what everyone pursues, and everyone should be "literate". If you obviously have no culture, but also install culture, this is called "arty."
Today's idiom "arty" is a verb-object structure, "arty" is a verb, meaning to follow, and "arty" generally refers to culture. But in ancient times, "vassal" and "elegance" were two different things, and there was no relationship between them.