My opinion. My father was a semi successfull musician and worked with the Allman Brothers for near 30 years before he died. So I always took what he told me to heart, especially about the music business. He told me once that talent can only carry you so far that most of the very intense guitar players he knew where not born with it. They worked harder than the average talented musician because they wanted it more. He said those born with a knack for music seldom developed it fully because they thought it would come to them. But on the other hand talented musicians that worked it hard became monsters. As far as fame goes I have seen many a musician that I thought should be famous and are not. I belive it is part right place right time, Marketable material (very marketable) and severe tenacity and dedication to the point of starving sometimes and it still may not come. It fully depends on the person and the mastery of his craft whether simple or complicated.