So if somebody says something like "Why does black hair look rough?." Or "I heard black hair can't grow." You're going to let then say that and not stop to educate them on the matter; so they can continue to sound ignorant without knowing.
"Black" hair has never been see in a good light that's why we have relaxers. What these girls did was give people a little insight so they can stop titling "black "hair as the hair nobody wants and needs.