I'd say the problem is that people get so emotionally invested in the stuff. The flimsy line between dialect and language should just be an interesting example of the ambiguity of human life, but people get enormously upset about it. AAVE should just be an interesting example of a dialect and how dialects develop, but everyone has to rush to judge it, not just examine and understand it.

The US has a long and proud history of rationalizing the perceived inferiority of black people using scientific-sounding arguments. Evolution, physiology, and psychology have all served this role, and linguistics is just another way to do it.