I don't think 4w3s are necessarily less introspective than 4w5s. More of what he says is 3-oriented than 5-oriented.
I'll flip this one around on you and say that it's more likely that he's in the rap game and projects the stereotypical 3-attitude BECAUSE he is a 3 wing rather than a 5. It could go either way, obviously, but I think a 5 wing would be more like Atmosphere.