They live in rap echo chambers.
A lot of African groups do.
It’s because they relate to or grew up around blacks, and therefore relate to the music, or else it’s because they think they should.
RnB would be considered too gay, or too soft.
I think Somali guys can have naturally nice voices. In my opinion, when I listen to those old Somali songs I’m collecting, the men sound smooth, with nice, attractive voices. Even in regular speech, I’ve noticed that some of them sound attractive, and have a really nice tone to their voice if that makes any sense.