In gaming. Indie devs can easily implement this change to gaming. They're not subject to the Hollywood effect of AAA games. Help create a better, more diverse environment for the gaming community.
While I agree with you in theory, I think this particular game might be a difficult one to expect it from. By all accounts, this game is an incredible achievement of overall design by a single person--if I recall, the guy did the coding, music, script writing and sprite work himself. Must we also expect this person to be an expert on writing for a diverse cast of characters from all walks of life, especially considering we don't know what personal experience he has interacting with different races?
If anything, I expect diversity more from AAA studios because they have the resources and (hopefully) diverse enough staff to competently write casts of characters from different walks of life. I guess I don't levy this expectation on a project such as this.