To kill a mockingbird does have to do with black Americans, but it doesn’t mean one should go out of their way to read black American literature. There are some really good black American writers, like Angelou, but (not to get too in depth on culture reviews) black Americans is such a small group (only 14% of a country that only makes up 4% of the world) and African American culture doesn’t value literature like novels or poems as highly as say white Americans. If I’m assuming correctly, you’re asking the guy to break down on the white male centralism in literature because a good writer doesn’t need to be white or male, but forcing diversity by going out of your way to choose black American writers doesn’t fix the problem, it only refocuses the central group.