Nature plus nurture, perhaps. A genius born into a family with a strong musical background.
I think if you don't like harp-related music, or African music, or jazz, or rock music, you might not find anything to like in Jobarteh's music, but if you like any of those genres then I think it will surprise you how many strands he weaves into different tracks.
My two harp music heroes are the Scottish duo called Sileas and the now deceased Irish member of The Chieftains, Derek Bell. In my opinion, Dawda Jobarteh is in the same league as these performers.