Sorry, I read you. You seem to not be able to understand that there can be more than one way to think.
You, has a game creator, have the right and might to make your game however you see fit.
So does he.
And, he is also perfectly correct in defending his choice of a non-white MC. It is only a problem for people with a melanin aversion, like you. I couldn't care less what the MC skin color is, I am role playing. There is indeed extra value in being different.
Not for you. OK. What else do you expect anyone to tell you?
Conformity is fine and dandy, until it isn't, in this case, it isn't. If a player is unable to get over the fact that a MC in a fight game is of a specific skin color, but is able to self-insert as a young kid with a dick that reaches his knees, the problem obviously isn't the game but the player.
You not being able to accept it, is what's wrong. Sorry.
Peace