Today, my Spotify playlist (300+ songs) suddenly played the Ten Thousand Hours song by Macklemore & Ryan Lewis. This made me think about the Outliers book by Malcolm Gladwell that I read about 9 years ago which was mentioned in the song.
The whole idea of doing something deliberately for 10,000 hours (416 days) to perfect a skill doesn't seem right but I do think it works.
It depends more on how you do it than x amount of hours put into it and the circumstances around. You also can't ignore special attributes that you might need to be successful like certain body types for sports.
Anyone can practice something for 10,000 hours but if they are not getting feedback on what is working and what is not working then are they really getting "good" at it?
Deliberate practice is very expensive since it requires getting the help that doesn't come for free to tell you what you should be doing.
While practice makes perfect, more often than not it requires a bit of luck and guidance.
If you see someone who is doing something you are good at, take some time out of your day to guide that person. I promise you, you will both benefit from it and it starts by saying "hi".