Sure... seems like an easier way might be to not join a gang, stay in school and then get some qualifications but I guess he's got some rather dubious role models.
Some times it's easier said than done, not every gang memeber wakes up one day and decides to go join a gang. It becomes especially complicated when you have family ties to a gang, you get associated with them regardless of if you're actually in the gang.
Music is a proven way out of that life.
This all seems massively flawed, I'm aware of the capacity for this stuff to be a moral panic, I don't believe that music itself makes people violent any more than say violent video games. The issue here perhaps though is the culture surrounding this type of music, that lots of this stuff relies on the reputation of the individuals or groups creating it. It doesn't appear to be something that is necessarily conditional on raw musical talent, rather if you're a member of a known gang and that gang has some credibility then that seems to be a significant part of the marketing in the drill scene ergo it seems pretty flawed as a way to escape gang stuff.
Anyone can make music and say what they want in their songs, there's plenty of rappers in UK hip hop/rap that have left 'the life' and have developed into very talented artists who actually spend a lot of time working on social issues to prevent people making the same mistakes they did. Drill is simply a genre of music, it's the way you flow, the instruments, and the way a beat is put together, that's not dependant on violence, you can say what you want. The more talented artists/producers do actually rise to the top of the scene, the content of the songs change slightly and that person doesn't have to continue living whatever life they lead when they started making the music.