> Why does this document even matter?

There is a massive discussion thread here, with multiple people saying "No one believes <unreasonable thing X>; it's really about <reasonable thing Y>". As in, "no one believes using a 100 emoji is cultural appropriation; people are just saying don't wear blackface". But every single bit of evidence (which includes things like best-selling books, essays in the prestige press, statements by government officials, etc) is dismissed as not real evidence that a substantial number of people believe something.

I suppose it's not something that can be resolved by Internet argumentation, only time. In a couple years we'll know whether this document is indeed ridiculous, or whether it's obvious that non-Black people should not use AAVE slang online.