it's not what people are saying it's how they're saying it.
rapping about aliens is not inherentely dope. deltron 3030 is dope, but del is a talented mc. he also had dope beats. also he has flow and voice.
btw those are both over looked in these discussion. you can have knowledge and imagery in spades but if the beat sucks and the flow's not on-point (or voice fucked up or w/e) theres no point to thet rack
the lyrics content is bigger than hip-hop. yuo wont get accepted as a rapper if you dont appeal to some aspect of the black community (even if that aspect is an imatation of an old aspect of the black community).
all the popular artists rap about violence. teh only dudes with mainstream following that g oagainst this i can think of is kid cudi. even wiz khalifa tries to project some thug shit.
the club music can be mindless, thatss almost all sound and no words. but its gotta be about throwing bows and buying bottles instead of enjoying yourself ie happiness. instead of looking for a girl to dance with youre chanting at hoes to back up on dis dick. everything has to be vulgar as fuck. i dont see anything
expectations have to change first and foremost