From a political pov it's obvious that they'd never make a biopic of public Enemy ala "Straight outta Compton". Cos NWA were offensive and said fuck the police but they weren't really radical at all, in fact they presumably helped Stoke racial fear/hatred of black people living in areas like Compton - I'm wary of saying this but I wouldn't be surprised if that was the perception that someone like Chuck D would have towards them and gangsta rap.
I find efil4zaggin a profoundly depressing album. I suppose it's just deliberately shocking and silly, really, but it still comes across as the most retrograde sort of music imaginable. I guess it set the tone for the Chronic and Doggystyle, though - nihilistic in the main, with the odd pause for reflection.