How much of art comes from the artist?

Following written or verbal instructions to learn to use a camera, write poetry/prose, paint by numbers, or sew is merely the beginning of how we learn to develope talents that may be hidden from us. Just because I can read music perfectly doesn't mean I have the talent to justice to a piece of music written by someone else, therefore, in my opinion, the one who can do so is creating art through the talent that they have been given. Being able to follow the instuctions on a pattern for sewing, crocheting, or knitting does not mean that the end result will look anything like you originally wanted it to. Talent comes in many different forms and fashions.

So, just for arguments sake, let's say person A writes a beautiful song complete with music and words but they have no talent to sing said song and do it justice, they involve person B to do the singing and it sounds amazing....shouldn't both people be acknowledged for the art that they have given to us to hear. The singer is no less blessed with a talent for art than the writer of the music.

I feel it is the same with any offering of art. 

----- LIFE: I messed up, can I have a 'do over'?