Practice makes perfect. Yup, every one of us has heard that- probably a zillion times, too.
And, for decades that was the established fact. Way back in 1993, Drs. Ericsson, Krampe, and Tesch-Romer published their results: The Role of Deliberate Practice in the Acquisition of Expert Performance. In that article, they declared that they could explain the difference between an elite performance and an amateur one by the amount of practice time involved. Not fully 100%, but 80%- which made this a pretty definitive study.