Going by the ones I know, at least, harpists aren’t overly thrilled with their repertoire. Admittedly, my harping acquaintances are heavily biased towards the ones who apply to new music–friendly festivals, but still, the point stands: There’s an awful lot of frivolous harp music out there (much of it, unsurprisingly, French), and while one or two pieces like that can be a nice change of pace, at a certain point, you want something with a little more crunch and substance. And that’s where composers come in.