I could understand why people might want art to portray a broader world that includes them in it, especially when introducing their children to that world.
It must be wild to see the world portrayed as if you didn't exist, and I think it's cool to adapt beloved classics with that in mind. Comic books have tried every thinkable variation of a character, from a Soviet Superman to a black Spiderman. It did not diminish the originals, but offered new versions with new perspectives.
This is something I'm okay with, so long as the originals don't get labeled as problematic or something.
The game is set in 1403 in Bohemia (Czech Republic). Yes, there were some black people in Europe in that time already. But I'd take a bet that if you went to the villages the game is set in today you wouldn't find a single black person either.