There was this guy who hung out out my home town pool room, back in the 90's, and for awhile, it did not seem like he took the game seriously, but he just liked to shoot for fun.
This guy had zero natural ability, and was just a banger.
Then he started getting really serious about playing, and started coming in every night, getting a table, and doing drills for like 6 hours a day.
I never personally knew a player who worked so hard on their game.
This guy went from like a level 2, to a pretty strong 7, with a super nice stroke in the end.
It took a lot of work though, but he seemed to love the game so much, and really wanted to become a better player.
All those 6 hour nights of doing drills, every day, really paid off for him.