A silk bonnet is protective headwear for all types of hair. It's not something that only naturalistas should be conscious of. Yes, maybe they may be more conscious than most but all types of hair need the protection that a silk bonnet provides.
Cornrows have been a major part of the African heritage, from showing the tribe you are a part of to showing your social standing. This hair style is still going strong today. There are so many variations of cornrows that it is really impossible to take away from the true beauty that some expert braiders can invoke from these braids.