Rock is just load noises with a greasy man screaming his head off
And if your saying music is all about melody,lyrically and aptitudely then why on earth are you listening to Rock ?
Unless you listen to a 15 year old's "heavy metal" garage band, that's not true, even for the more mainstream rock. Download some Nightwish. Stargazer as a song example. It's heavier rock, but it's beautiful and is sung by amazingly talented woman. The guy in the band who writes the songs is Finnish, but even he manages to make beautiful lyrics in English, better than a lot of the artists who speak English as their native tongue.