I agree with this. When you enter the zone, hot streak etc, is definitely unpredictable, but when you find it, there is little that is random about your performance. There are so many factors that can contribute to that type of play -- really having good mechanics that day, a good frame of mind and building confidence, better mental awareness of the entire court, peak conditioning and health. It must be the way Larry Bird felt almost every game. LOL!!! On that day you know that you will be hitting 80% of your shots instead of your usual 40%, and hopefully your team and coach realize it and feed you the ball, because each time the ball leaves your hand on that day you don't have a 40% probability of hitting each shot. Your probability is much higher.
When you get in a zone like we are describing, the performance seems effortless and your stamina is unbelievably better than usual. You could play for hours.