is cultural appropriation a thing?

There is this post that has got me thinking on why we have people all over the place complaining about cultural appropriation.

I think we have real problems than worrying damage that would come about if some white fellow started adorning a Luo head gear or playing nyatiti for that matter. What does it matter really? Are these real world problems? Have we solved all the problems that what is now left is arguments on who should wear dreadlocks and who shouldn’t?