Begin biased against Black skin is a problem (and is the important bit in some instances). Being biased against "Black" names is also a problem, even if you can devise situations where the name is attached to a person who doesn't have Black skin. And both are racism, because they are directed at people based on the assumption that they are in a particular ethnic group, even if that assumption is wrong.
You assume a racist motive in your scenario, but what if the bias is actually towards all unfamiliar names, only some of which are black names?
The specter of racism is so great that people are expected to be free from every potential bias because it could be race-equity related somewhere.
> You assume a racist motive in your scenario
No, I don't assume any motive whatsoever. I'm talking only about actions.
Yes, you are missing my point. I am not insinuating anything, I am stating directly that some people might be biased against unusual (to them) names. Names that are difficult to say, spell, etc. depending on the language, or just out-right stereotypical prejudice with a name (which is what these studies just assume). I am not saying that any of this is ok, people rarely get to pick their names. What I am saying is that it might not all be based on the color of people's skin.