Why?

Why does American pop music have
1. No interesting themes besides partying or love?
2. Overly repeat words and phrases
3. Brainwash the youth of America?
Why does rap music have so much cursing?
I'm mostly concerned because my younger sister loves listening to Z100 and she listens to things that have profanities and songs by Ke$ha that have bad themes like drinking and partying, etc.
Super disappointed. That's why I like listening to songs in other languages because the lyrics are more poetic and well crafted with meaning and there are different themes besides partying and love. Plus no profanities! I hate when people curse in songs, it may have nice music and a good beat, but as soon as the words come out *cringe*

WOULD YOU RATHER? 
Be paid to be stuck in a room for a year OR Do what you love for free?