Hmm, something has pushed your rap buttons ! That just seemed like an excuse to have a pop at rap music. And unwittingly, you've hit upon the wheel on which this debate turns. Yours is the purist view, which unfortunately, like alot of purist views says more about the holder of the view than the actual subject !
Much of what you said reads like what people in the early 50s said about black blues, what people in the latter 50s said about rock and roll, what people {jazzers included} in the early 60s said about free jazz, what people in the mid 60s said about the Rolling Stones, what many in the late 60s said about the avant garde and the synthesizer, what many in the early 70s said about Zeppelin and Sabbath type heavy rock, what many musicians and commentators in the mid to late 70s said about punk, what many in the early 80s said about digitally recorded stuff..........
THAT'S NOT MUSIC !!
But it was, you know.
By the way, even a spoken voice has pitch.That's how a blind person or someone listening to the radio or some poetry can work out how emotive someone else is being.