I've written two books over the past decade as well as learning some other skills and hobbies and this is absolutely the most vital lesson I've learned. There is an incredible power in simply pouring a little time into something every day over a long period of time. It feels like a superpower when you see it start compounding. The Grand Canyon was created by little drops of water bouncing off rocks for millenia. Cons…
I can think of some counter examples. Golf is a big one. I have friends that play every weekend and never get better.
A person doing a drunken Saturday 18 isn't going to improve. A person going to the range and focusing on technique 20 minutes a day will improve, with far less net time spent.
I think of it in terms of the "10,000 hours to mastery" - how many masters of driving do you see on the road? Most people are just barely not crashing from place to place, not focusing on skill.