I don’t have a definitive answer but I will say this. I’ve been watching lots of harp vid on UTube. Some players (famous or not) are dead boring to watch and listen to while others have me entranced and it has nothing to do with the difficulty of the music or correctness of their playing.
Some players just seem to have the ability to connect to the music and bring it alive, even if the music is incredibly simple to play. Others can play well known “challenging repertoire” and the whole piece falls dead even though the notes are being played correctly. It’s like listening to a pianola, correct yes, alive no.
I personally believe the difference isn’t natural talent but passion. If you are merely skilled in a piece and play it correctly without ever having a passion for it, it will always sound dead and laboured.