In this day in age, the more violent and even inappropriate music is, the better it sells. It's sad. It even goes for television and movies. R-rated movies sell better than PG-rated ones. And that's a good bit of the reason of why the world, and especially younger generations, have become a lot worse, swearing and violence and all kind of stuff.
Not quite.
PG-13 sells the most, and most conceptual R-rated movies are hacked down to get a PG-13 rating (like Suckerpunch or the last Die Hard movie) so teenagers can see it. Often times, these do ruin the movies, and they just get an unrated when they hit DVD.
But like I said, most PG movies are basically G movies with an edgy marketing spin. There is nothing PG about Madagascar 3, even cutting out an extremely mild "profanity" in their version "New York, New York, it's a HECK of a town." The only thing that made me cringe in that entire movie. However, Pirates: Band of Misfits, Rango, the Shrek franchise and The Incredibles are worthy of a rating due to cussing (OOOh, Rango had a lot of cussing) and Incredibles' extreme darkness of having death played off as a joke ("No capes, dahlink"). But half the PG movies I see are G. "rude humor" shouldn't be the reason a movie gets a PG... and less and less films I see, thankfully, have rude humor.
And I think we're getting to the point where this type of music sells so much that people are forgetting how to produce good quality music. And the ones who do often are overshadowed by the other ones.
Music tastes are relative. There is a LOT of common ground of what's terrible (mostly poorly written dance music, corporate hip hop... stuff like that)... but everything else is equal to taste.
We'll never see bands like The Beatles again, and we have to accept that. When something ground breaking shows up, it basically means there's less ground to break for the next guy. Look at (and I have to use a non-musical example) Batman TAS. For the longest time, there was no physical fighting or even dark imagery in comic book based cartoons. But once that show came out, no one felt The batman or Brave and the Bold special, even though they're just as violent and can be very dark. Show either of those in the 1970's, when all they had was Superfriends, and they'd be called vile, nasty, and disturbingly violent. Now, everything's on the table and it's not impressive.
Same deal with music. Some band comes up with some amazing artistic, experimental music, and they're just accused of copying the Beatles. They make regular music, and they're not as good as the Beatles.
But again, tastes. There was a big movement in the 70's about singer/songwriter music. And while I have nothing but respect for that, and the fact I like Paul Simon, I actually can't STAND most of that music.