It's not the draw of luck, it's the draw of balls. Big, ambitious cojones.
Anyway, It meant it's like drugs because if it happened every race, it wouldn't be as spectacular. When the brain gets a high, it strives to repeat that high. However, the more times you see the high, the less high it is. Therefore, it puts you lower and lower. Metaphorically speaking, this process would bore the spectacle that was Dijon '79 if we saw the same thing every single race.
But i'm for it, anyway. As long as it's for the good of the sport.