this definitely happens in other genres. However I think it is more prevalent in hiphop just based off the fact that the rap game is just so much easier to get in the game.
Lets be real, out of all the genres of music rap, BY FAR requires the least amount of talent/skill.
which allows tons of ppl that chance to get in the game, and ultimately to be eaten up, and spit out and milked of any money that they have or can earn.
If it isn't Jazz or Classical, then it isn't difficult to get into it at all.
IF you wanna start a metal "band" TOMORROW, you could buy a guitar, learn the major and minor pentatonic
scales, download a drum pack and an e-bass, get any one of these daws free or paid and BOOM you're in business.
It doesn't mean you'd be a GOOD metal musician but you'd be a metal musician nonetheless.
The barrier of entry for music PERIOD in 2015 is incredibly low, I completely disagree with the idea
that Hip-Hop rap takes the "Least amount of talent/skill" it can be as complex and difficult as the rapper
wants it to be just as any other genre.
As for the topic at hand, really this issue seems to be common in any place where artists have access to their
vices and a bunch of yes men who don't care if they do better as long as they're along for the ride.
Marvin Gaye ? Loved coke, still an R&B GOAT.
Michael Jackson ? Messed around with prescription pills until they took him out, still an R&B GOAT.
James Brown ? Another story with some substance abuse in it.
Many, many artists famous and unknown have likely been around things that could halt or completely derail
their careers but they had no one to hold them down and stop them from engaging in something self destructive.
That's actually arguable. Writing lyrics to rap song actually requires a great deal of skill in comparison to other genres of music. It sounds effortless when listening to the finished product, but creating a song from scratch isn't that simple.
This.
I can rap my ass off but when it comes to writing songs

that's a skill
I need to work on. And really it's only made me respect legends that much more
because I realize it's not nearly as easy as brehs like to act like it is