I actually care about racial representation in movies/television/entertainment in general, but I think putting a random out of context black character and highlighting it isn't representation. Diversity is something we should aim for, but we can't force it, and it doesn't make sense to care about it exclusively on entertainment.
I guess the scenario is a bit different in USA, it seems that there is many shows that feature black people, I'm from Brazil and despite more than half of the country is black or mixed, you can't guess it by the TV or mainstream cinema, now it's slowly changing, I think it's cool it will be different in a while.
It's a bit absurd that, for example, one of the main works about slavery – it's originally a book, but there is two or three TV adaptations – features a slave that is white, although there wasn't white slaves in Brazil. I mean, people wouldn't like a black protagonist. Also, we have a huge asian population, and TV often puts white people to play asian roles (that aren't frequent).