I disagree, and strongly so. There's an old Proverb I've always liked that goes as follows, "Without counsel purposes are disappointed, but in the multitude of counselors they are established." In other words you would do well to value the suggestions, ideas, and thoughts of others who although you may disagree with, both you and they wish to see a solution to a common problem. Cutting down someone you disagree with only
That said, regarding the symptom, I'll tell you something from my experiences. About 15 years ago I took a job for pay that wasn't exactly ideal to me, but I took the job because the company it was with was and is still growing. Being young, and rarely ever getting sick, I declined to take the health insurance because I wanted to pocket that extra two to three dollars an hour. Well, my dumb azz got sick, developed a dry cough that I couldn't shake and as time went on that cough came from someplace deeper and deeper within my chest. Eventually I started producing green flem which indicates an infection. No health insurance, and no experience in the hand-out game with free clinics, I just endured it. When you have an infection like that, OTC cough and cold products don't help, only help mitigate the symptoms and help you endure. Eventually my mother got a doctor off the record to call me in a Z-Pack at the local pharmacy. A week later I'm straight.
My point is this, while I agree that an argument can be made that the music might perpetuate some of the fukkery going on in hoods across the US, it still will only warrant but so much credit. Likely only minimal credit at that. During the 80's before Hip Hop took off, did you blame Midnight Star and Cameo for the violence in South Central, Chicago, Detroit, New York, etc.? Of course not. What about in other countries? The Favelas in South America? Kingston, Jamaica? Or on the music tip, look at Narcocorrido genre, which is basically Mexican folk music with a gangster theme. If Narcocorrido music were eliminated tonight, the cartels would still be slaughtering one another, leaving innocents in fear, all the while the poor in Mexico City would still pay a 1/3 of their daily wages on water.
This sh!t is way deeper than any music. Again though, I do agree that an argument can be made that the music might perpetuate some of the fukkery. What I don't agree with, is giving the music too much credit which is what I think folks like you do. Could rappers be better role models? Yeah they could. The bigger problem as I see it though, is expecting them to be such while not looking at the parents and guardians of the youth. That opens up a whole other can of worms that has nothing to do with music.
At the end of the day, people makes CHOICES to do the things that they do 
) cardiology and violence aren't even remotely relatable. Cardiology is a science, violence doesn't have easy answers. One thing that CAN be said for certain is that violence stems from poverty. There's far worse violence going on in hoods that don't care about rap music.
