Nas is 40 and still talking about Queensbridge...
Jay-Z is 40+ and still talking about hustling in Marcy
Drake is a millionaire superstar in his mid 20's still talking about how he "Started From The Bottom" and the times before fame when these hoes were breaking his heart...
The main thing that all of these themes have in common is that these were the places, events, and themes that contributed the most to the artist's individual experiences. Therefore this is naturally what they would draw upon in order create inspiration in their music. J.Cole is no different with his primary life experiences having taken place in Fayettville and College....
It ain't hard to tell