Sorry, no. Depp's lack of skill is because he is not because of a lack of formal education. There are plenty of great musicians, both jazz and rock, who had no formal education. Depp is just not one of them. I doubt he ever spent the long hours of practicing required to be a serious guitar player.For the Classically trained musicians among us which include a lion-share of Jazzers, there is a great divide between Folk Arts(Rock and Roll, Blues, Folk, etc.) and music which requires formal training. "Folk" music is limited since the "player's" knowledge is limited and there's always a terminus to their creativity based on technique and education. Johnny Boy is a prime example of this reality and his oft-repeated tiring "licks" are testimony to this reality.
Joey Alexander was an extremely talented prodigy who is now an extremely talented adult. He is deserving of his own thread. I just can't figure out what he has to do with this one. You seemed to have missed the point of why I posted the video of the little girl.