I personally think that some people do have talents that are probably inherited via their genes. Such talents can give individuals a facility for certain skills that allow them to excel, while more hard-working students never manage to reach a comparable level. But, as with all questions of nature versus nurture, they are not mutually exclusive. Good musicians or artists and exceptional sports stars have probably succeeded because of both good training and natural talent. Without the natural talent, continuous training would be neither attractive nor productive, and without the training, the child would not learn how to exploit and develop their talent.
In conclusion, I agree that any child can be taught particular skills, but to be really good in areas such as music, art or sport, then some natural talent is required.