The whole fuckin problem is simply the fact that the industry has taken complete control of what they want to hear and not what we want to hear. Back when actual RAP first started there was nothing they could do to hold it back from the public because it was something brand new that they had never heard of and telling the truth about society, sellin shit outa their trunks to make $$$ and starting their own rap labels...
But once it became a house hold genre thats when big industry stepped in, took control of everything and monopolized that... You think people like NWA, Public Enemy ect. had record execs tellin em what to put out? Fuck no, they were their own company.
But now it is so popular and takes control of so many other aspects in life (clothing, drinks, perfumes/colognes, speech, cars) that all they want is shit that keeps perpetuating those markets. Hence the reason u only see mainstream promoting alcohol, bling, women, cars n money). Because not only does it make records sell more, but it makes all those other items in videos n shit sell. Rap has popularized not just music but many alcohols, rims, certain clothes and so much other shit. And thats why it aint changing. It makes money for everybody...
Puttin Tech N9ne on your tv is going to do what? Not a fuckin thing but sell records, which is nice but it doesnt produce any additional income and noone will want to endorse that which is why him and people like him dont ever get heard on a large scale. Now if you put an artist who is gonna SING not even rap about SUVs and 24' rims and Nike's and Rolex's and Crystile (WTF ever) and get people out to the clubs to spend more money, they are the ones that are gonna be put on the radio.
And until society realizes or just simply gets tired of just seein a bunch of fuckers with money and dance moves, hip hop will will continue to pump out artists who just sing about bullshit and nothing real... WHich sadly, I dont see happening anytime soon. It aint about substance anymore, its just about hooks and beats. Your verses dont fuckin matter anymore in mainstream.