As a black man and a huge sports junky I am bothered by 710 ESPN and Sports Radio KJR here in Seattle. Because their happens to be ZERO regular African American hosts on both stations. No diversity of opinions. It is a fact that whites and African Americans think differently about every thing. Including sports. As a result a sport like the NBA is not discussed on sports radio here in Seattle. Hosts like morning show host Mike Salk on 710 refuses to talk about the NBA for than a minute. He has said right on the air how he dislikes the NBA and loves MLB. To basically have a studio full of white folks giving opinions on African Americans in the NFL who they CANNOT relate to is to me RACISM. MLB is a sport that African Americans do not care about. Young African American youth turn to football/hoops by age 12. The white hosts on KJR/710 refuse to discuss this topic. There is NO EXCUSE for 710 ESPN and Sports Radio KJR to not have a regular African American voice as part of their on air staff. NO EXCUSE!! The city of Seattle is a top radio/tv market. This should not happen. It seems in order not to discuss this topics many of the hosts on KJR and 710 have PUT ME ON A BLOCK ON SOCIAL MEDIA!!! SAD SAD SAD!!!
Let's look at music radio stations, and confine the discussion just to the music, not the jocks or anything else.
There are dozens of partisan groups for different kinds of music. And many of the members of each of those groups would not like it if "their" station started playing music they did not care for. If a rock stations starts playing lots of Celine Dione songs, the rockers would revolt. And if the country station added a bit of Fleetwood Mac, the fans would likely, all be annoyed and tune out.
Getting into ethnic and racial territory, if an AC station starts playing hip hop and urban that is nowhere near crossover material, the AC soccer moms are going to be similarly disgruntled. Or if the Classic Hits stations starts playing Regional Mexican banda music in Spanish, the audience would disappear instantly.
So there is, as you say, a difference in the appeal of certain sports and teams based on race. A sports station that targets 25-54 white men, who outnumber Black men in the same age group in Seattle overwhelmingly is not going to sacrifice a group that makes up two-thirds of the market for one that represents less than one-fourteenth of the market (6.7% to be exact).
Radio stations program for the largest audience available. If a certain format attracts mostly... or all... whites it is not going to annoy that group to appeal to a smaller group if, in fact, doing so would lessen the listening by the core.
I ran into situations programming Spanish language stations where folks from other nations objected that "none of their music" was played on a station that was designed to appeal to the 90% of the Hispanic market that was from Mexico. We were not discriminating against those other listeners... there just were not enough of them to warrant a station licensee dedicating a facility to serving their different interests and tastes.
In the argument you make, the issue is not racial but quantitative. If spending more time on basketball as you define it would please more African Americans, but at the same time cause disengagement by white males, no licensee is going to make such a move.
That said, I do think that a smart sports station in your market would have someone available as a guest who could participate with an African American perspective on basketball subjects where there would be a productive and engaging discussion on the Black perspective so that all those white guys understood that there are differences in perspective.