I'm not sure what you mean by "superior" here. There's an English language with its grammar rules, and there are common mistakes or detachments from widespread usage patterns which people make in English.
This is wrong. There is not 'an English language'. There is Standard American English, Scouse, Glaswegian, Received Pronunciation, Jamaican English, AAVE, and dozens of others, many of which you would find harder to comprehend than AAVE.
What would be the reason some of these should be institutionalized with four-letter acronyms and research programs and, I have no doubt, juicy grants?
As I keep explaining, this article does not advocate AAVE speakers should not be taught SAE, but that by recognising their native language they can be taught SAE better.