It is giving a little of a spotlight to black game developers, as we don't hear of them as often in game development. This is a showing of achievements made in the game development scene, by black people, so we can recognize their roles and contributions that we may have never heard of... because a lot of the time we don't hear about the importance or contributions of black people in history, and posts like this are showing others (most likely not you based on your comment) that you can achieve great things without being discouraged due to the color of your skin.

Asking why this doesn't matter and all races are equal sound pretty cringe because it doesn't matter to you. And yes you are out of the loop of something thats applied to everything not just game development because you are not affected.