Rap came from the slums of America and largely still does, Sprint.
It's the lowest form of 'music' you can get.
It's basically just a continuous beat and talking... yes talking..
Because the people who created it couldn't sing for krap... hence... that's where the casual talking came in.
Can you honestly tell me that Snoop Dogg or Eminem has a good singing voice?

Slowly but surely over the last century... music has gotten worse and worse.
First we had classical... which was the pinnacle of musical achievement in human history. Nobody has matched it. Suberb.
Then came Jazz... a very primitive form of music... but music nevertheless...
Then came the blues.... which further cheapened Jazz...
Then came rock... rock.... is VEEEEERY primitive compared to classical. Classical is a lot more complex... with different tones, instruments, notes, etc..... rock and roll is 100 times more simplistic.
Then it all went downhill from there.
Finally we have rap.... the lowest form of 'music'... music for cavemen basically. Which is why is emerged from the peasant sector of the United States. Anyone who listens to it doesn't realise that they're listening to it for the 'image' alone and is of little to music value at all.
Give me gospel any day.