Wow.  
Two opinion pieces in two days about cultural appropriation. 
Somewhat amazing given that there's no such thing. 
'Cultural Appropriation'  (along with travelling companions Cultural Genocide and White Privilege)  is a pseudo-intellectual nonsense term.
A term  that is entirely subjective (so the goalposts can be relocated as necessary) and exists solely for the use of those who practice and/or intend to profit from the dark art of faux-oppression. 
Why?
Because real, actual oppression (along with the victims and the oppressors) is, for the most part, long gone. 
Not to worry, as the world abounds with cultures that are only too pleased to share - without including a guilt trip.