Cultural conservatism is pretty much reducible to bigotry of one form or another, whether racism, chauvinism, homophobia, jingoism, religious bigotry (decades ago, people had to prefix "racial" to bigotry, as the default meaning for "bigotry" was religious prejudice,) or any combination thereof. I don't think it's an accident that Nashville, capital of "country" music, which in practice seems to mean White and rural music, as opposed that other stuff, has more of the ostentatious cultural "conservatives."
Hollywood, instead, has aspirations of reaching a national audience, including the urbanites, including the minorities, including the majority sex. Being an open bigot really is not good sales practice. As for Hollywood's blatant use of sexuality, it also tends to tack on the crudest of moral messages to satisfy the conservatives. For example, in horror movies, the audience first gets to enjoy the sluts on parade, then gets to enjoy seeing them killed.
Prurience sells. Rural white audiences eat it up on shows like
Dangerous Housewives. And many reality shows are based on the crudest kind of prurient interest. As long as lip service is given to conventional morals, everything's good. Even the supposed sophisticated cable programming seems largely a matter of selling sex, with very little artistic innovations. And doesn't the obligatory terminal moral that's supposed to take the curse off show up there an awful lot as well?
In the nineteenth century, a culturally conservative time if ever there was one, prostitution was much more pervasive than today. Doesn't that tell you something about cultural conservatism?
Cultural conservatism is a phony concept, code for bigotry in my judgment. But selling sex is just business. Hollywood is not particularly socially liberal, either. The thread premise is nonsense.