After having heard so much classical music, I can testify to the fact that great composers are rare. There are many technicians, but very few artist that have something original to say. Goethe talked about "snatching poetry from the air," it is the same way with music. I have heard the music of hundreds of technicians, but very few artist. This simply makes me appreciate an original voice when I hear it (even if the voice is not to my liking). While composers are abundant, great composers are rare. We could say the same thing about pianists. There are many competent technicians, but very few artist. Here I can give a concrete example: take Evgeny Kissin versus the mighty Sviotoslav Richter. Even Gould spoke of the artistry of Richter (I can assure you that he would never have discerned this in a technician like Kissin). This is not to say that Kissin has not performed some powerful pieces in a powerful way. (You can listen to Gould's commentary on Richter on youtube).