Great post here. This says it all for me. I just wanted to add that recent research suggests that 10,000 hours of effective and deliberate practice will make you a master of your instrument. Keyword here is "effective." Recent popular books such as "This Is Your Brain On Music" and "The Outliers" both point this out with examples. Yes, as many of you have pointed out there are natural born talents like Mozart. But these types are few and far between. The majority of musicians who mastered their instrument put in the 10,000 hours of effective practice that these two recent books talk about.Even that is pure rubbish. He practiced more than most in history have practiced and he did so from a very, very, very young age. He was born on stage and attached to a drumset so to speak.
That myth of Rich hardly practicing came about later in his career from an interview in which he said he doesn't practice anymore, meaning at that stage he didn't practice because he was playing every single night for hours on end. That's still more practice than ninety-five % of people get at any age. It was also playing/practice which develops skill much quicker.