10,000 hours is an average. I first heard it Malcolm Gladwell’s book Outliers. The point is the more experience you get, the faster you grow. The more you grow, the better you get. It’s more than just repeating the same task over and over. Growth means you stretch, you learn, and you do better today than you did yesterday, even if it’s only a fraction (which it probably is).
That will also help you improve your instincts.