I would never advocate someone not to practice. Charlie Parker said he practiced 12 hours a day for a period of 3 years. I didn’t enjoy practicing formally out of books and exercises so never did that as I simply wanted to make music from a very early age. I used my ear to teach my body to execute what I heard. As I developed I heard more and my ear responded by training the body. Looking back I wish I had put the 12 hours a day in. The thing that amazes me is that I have been able to hold my own with other artists who did practice formally intensely ranging from Benny Goodman to Chick Corea. What I want to impart is don’t ever underestimate the power of the ear. Whether you practice formally or not, you will need to cultivate that ability to be a real jazz artist.