This seems to move the idea that you might not understand how skilled you are to some kind of law that ties humility to knowledge more strictly.
Maybe this is my misunderstanding but I don't think the common invocation really took it as a law that the unknowledgeable always think their skills are higher.
It makes sense to refer to it as a concept but it's probably not an appropriate assumption to make about people.
[0] https://www.mcgill.ca/oss/article/critical-thinking/dunning-...