Sure they can branch off for a few songs but basically any male artist will make songs about women, life, happiness as their main topics.
But what I think separates the very good and the just okay artists is that there are millions of different women to make a song about, millions of things to make you happy and to say about life and the just okay musicians end up sounding like they are talking about the same thing/woman over and over.
I think the best way to best way to have versatility is if they are able to have narratives. Songs like Brendas got a baby, Stan, N.Y. State of Mind etc. You can say a lot more if it isn't always from your point of view.
Joe Budden is an emo rapper. That is the extent of his subject matter, yet this track is probably one of the best I've heard. It says nothing about versatility if you can make 1 good story telling track about another bland topic.