making some big generalities there, hutch... do you really think all rap is exactly the same as vanilla ice?
and in case you haven't been keeping up, the age where rappers can rip entire songs via samples as use that as the only basis for a tune is essentially over. clearing samples has become cost-prohibitive. other than that Minaj "my anaconda" remake (which she had sir mixalot's permission to do, so nothing to clear), when was the last time you hear a rap song that was a clear, top-to-bottom rip of an old tune? yeah... vanilla ice. 1990. all those classic rap albums from the 80's and 90's couldn't be produced in today's environment. instead, rappers need to use session musicians, royalty-free samples (i.e. music you've never heard of), etc.
i'm not a big fan or rap. i listen to some, occasionally, but i've def not a fanboy. on the other hand i feel that dismissing the entire genre as "inane babbling over someone else's music" is asinine.