I grok what that poster is getting at - and the example of her child's mind is totally fascinating - but the stuff I wonder about is the stuff that does make you aware of world diversity, and isn't too overtly awful in the racism department, but which still gives total narrative centrality to white people and makes POC play all supporting roles. Analogizing from gender, it's the problem of women in refrigerators - the issue isn't women dying, it's women dying in a way that makes their death part of someone else's story, rather than their own. I grew up on a lot of media that was inclusive, accurate, and inevitably placed narrative focus on white characters. It taught me a lot, but I feel like the more ideologically pure route would be to just let them be POC stories - in other words, do The Last Samurai without Tom Cruise, or Avatar with just the Na'vi.