I have no issues with authors writing fiction about other cultures as long as it's properly researched and accurate and does not portray incorrect stereotypes.    I think James Michener is such an author.  

I saw Glenda Jackson as King Lear at the Old Vic last year.   It didn't bother me that she was playing a male role but in the context of this debate I am wondering if she is guilty of gender appropriation.  Side bar - I would like to add an emoji here but can't.  That would be a nice upgrade to the comments section.