It's easy. Amendment 1 and 2 are examples of specific rights granted. Amendment 9 tells us that we have MORE rights that those named specifically. This suggests that each named right, and un-named rights, are more braodly applicable than the limitations of their specific mention.
I'll remind you that the status quo who took Bruce and Ferlinghetti to task were ALSO "just thinking about the minimum standards of safety to the public" as well. You just made the same argument used to keep Lenny Bruce from saying ********** on stage. The very same that was used when Ginsberg's gay poetry was being sold at city lights bookstore. Unless you can pass legislation to repeal the rights guaranteed by the bill of rights then your rationale, regardless of how logical YOU feel about it, should mean nothing to the liberty of other citizens. It's the same reason why we've been arguing about what constitutes OBSCENE for 50 years. Indeed, I'm sure the reaganites in the 80s had an opinion about art and porn qualifying too. I'm reminded of John Ashcroft covering the naked tits on a statue. Indeed, it is imperative to interpret granted rights as liberally as possible or risk losing them to litigious opinions altogether.