Note also that most…
Note also that most crusty cultural conservatives who object to hip-hop care very little about the endless use of misogynist and homophobic invective. Typical complaints have usually revolved around (1) the use of dirty words, (2) hostility towards established authority in general and the pigs in particular, and (3) musically illiterate complaints about how “easy” it is and how there’s no musical talent involved and the rest of the usual claptrap.
Incidentally, just to be clear, when you say this: “Why couldn’t Rothbard just say that he didn’t care for certain types of music rather than develop a wordy critique that opens him up to look foolish on the subject?” — are you complaining about Rothbard, in particular, holding forth on things about which he was ignorant, or are you mounting some kind of general complaint against people offering “wordy critiques” of general aesthetic trends or genres, instead of merely confining their complaints to “I don’t care for it”? Because the first point seems to me to be obviously right, and the second one dangerously tempting, but in fact quite wrong.