Nisht, the point is that he compared writing a song to inventing a machine.
Here is the passage that is relevant to this thread:
????? ????? ?????? ??? ???? ??? ?? ????? ???? ??????? ???????? ?????? ???? ??? ?????? ????? ??? ???? ????? ?? ?????????? ??? ?????? ???. ??”? ?? ???????? ?? ????? ??? ???? ??? ??? ?????