@ljrk I'll keep it simple. We tried that. We are trying that. Look at my instance name. Look at the about page. We have robust moderation. It's not enough. Black folks do come here, but they rarely stay. More often, they get harassed until they leave. I've seen it happen many times.
I'm a Black queer person standing in front of you telling you the same solution doesn't work. If you want to know why, take it up with your fellow white people and their racism. All we can give you is the truth.