I'm all for good roles being played by whoever auditions the best, but it's sort of a separate conversation, isn't it? Whitewashing is a very specific issue, and is an issue simply because there's so little diversity to start with. If non white actors were regularly being cast in leading roles, or even dominated the casting in Hollywood movies about their cultures, it wouldn't seem as noteworthy. But, that isn't the case, and as tired as people may get of them...these conversations are the first step to changing that.
And not for nothing, Iron Fist is not just a rich boy turned martial arts vigilante. He's the rich son of a rich man who discovered a mystical city where everything is martial arts, honor and dragons and everything is Chinesey. There he becomes the bestest of all the scrubby native students, and duels a dragon that burns a dragon tattoo on his chest, and learns how to channel his Chi into an amazing IRON FIST.
Man, reminiscing about it has killed any enthusiasm I had for the series. Whoops.