Whether it's a bow or a harp or some kind of amazing redesign of a fishing net, there's one simple thing that people are ignoring whilst shouting their "real harps/lyres don't do this" pieces:

Final FANTASY XIV

I will also admit I got mixed into that crowd during the spur of the moment and 'harped' on about what a harp/lyre looks like in reality, but then it only took one look at the game case to remind why reality means so little in this game.