Are any of those rap artists you named legendary? D is supposed to be a legend. One of the yodas (Jimi, Marvin, James Brown, Bob Marley, George Clinton, Stevie, Al Green, Aretha, Miles, Nina Simone, Joni and Prince) so I can see why people have an issue with indecipherable lyrics even though it doesn't bother me much because his music is so damn good IMO.