Your link goes on to explain that that is probably not down to racism, though (at least, not directly):

For example, longer lines correlate with urban areas, and so do black and Hispanic populations. It makes sense that any location with higher population density is going to have more logjams than a rural voting station. (Bolstering the point, individual white voters in racially diverse ZIP codes waited far longer in line than white voters in extremely Caucasian ZIP codes).

Regardless, it’s clearly about provision – there’s no reason it would have to be true here.