To the broader point, I think what Uzo is talking about is "representation."
Which doesn't just mean "some type of person on the screen." It means the full diversity of experiences and aspirations of that type of person... on the screen.
Living Single isn't Friends with African Americans.
It's African Americans put in the situation of Friends, and then living their own similar-but-unique story in that situation, informed by cultural differences. (IMHO, it's also a helluva lot better of a show)
The 90s had a lot of shows about middle class, successful African American families.
That kind of... stopped. Once TV got homogenized and distributors realized that African American viewers would watch shows about white people, but white people weren't as happy watching shows about African Americans.
And the lack of aspirational and affirmational media that speaks to every person is absolutely a problem.