I've spoken to BCA Hall of Famers, such as Hopkins and Fleming. They each ran over 100 balls after having played pool for only about one year, without ever having taken a single lesson!
Well they had to learn the concept of a break ball and possible positions from someone. They had to learn the rules from someone. To say they ran over 100 without taking a lesson is to mislead the reader. They may have never received coaching aided lessons, but someone had to explain things to them. They learned the same way I did, a few words to lead them on a correct path. Also ask them if they had a clue about the patterns they were playing. And ask them also if it was one year after they first picked up a pool cue and shot a game, or one year after they got hooked into playing. I first played over twenty years ago, but got fully hooked only 7 years ago.