Most people never truly practice. They do things that resemble practice, but doesn't have the same effect.
My example is from pool: many players have played pool league for 20+ years without improving their rank. They "practice" every week by playing with their friends. Nothing about pool is, in my opinion, hereditary / "natural talent"...athleticism doesn't matter at all.
I became a better player than those others in a couple of months by focused, deliberate practice on the things I was worst at. Later, I practiced one skill (a draw shot) for countless hours--I was bartending in a mostly-empty bar. I became the best in town at the skill in a couple of weeks.
In all my time practicing, I never saw another person practice. People want to try all the other shortcuts and tips to avoid "hard work." It sure pays off, though.