It is very common in sports where the ball is still, that performers and coaches agree that the mental side of the sport is just as important as the physical side. Sports such as golf and snooker and events that require aiming for a target such as darts and archery allow for the brain to be infiltrated by negative language.
There is time. Time to think. Time to ponder. Time to worry. Time to think “What if”. I know having spoken to many golfers that there is too much time in the game to go over the negative aspects of your game and the conscious mind begins to replay every bad shot you have ever played. “I always hook it left on this hole” or “I always put it in the lake here”.