Where else does that copyright protection occur with regard to intellectual property?  Can you think of practical examples?  I'm not talking about plagiarism.  I'm talking about ideas.  

Next question:  What do you mean when you give the example of 'indigenous humor from a local Cree community'?   Are we talking about registering and enforcing copyright of jokes and funny stories here?  Humor's common to humans. 


Look, what I'm seeing so far in this cultural appropriation thing is the message:  "You can't use this, it's ours."  But ideas are shared among all people, that's how it works.  Stories are shared, joke patterns are shared, dramatic ideas are shared, themes are shared - that's how it works.  It also works like this:  If it's a straightforward ripoff, an exact copying of someone's art, it gets criticized for that, ridiculed, and possibly sued.  It happens after the fact.  But saying to everyone:  "Don't touch this, it's not yours to use," when it comes to ideas, doesn't fly.