Practice makes perfect. But you shouldn't aim for perfection.

[ Time for an encouragement speech! Hopefully he'll appreciate... Probably not. ]

Just aiming to do better than your previous attempt is enough. Surpassing yourself is far more challenging than trying to surpass the world's best and failing, I think. And then as you keep surpassing yourself, without realizing it someday you're contending with the world's best. That's how most people who get there do it, I think.