Rest of poker can give you a sense of clarity, which previously lacked. When you play too often (whenever awake), your thoughts may be under the constant influence of the game. Many hours of grind and repetition of the same situations, also increases the risk of playing on autopilot. Everyone knows that if you do not think through solutions rather well, you have not be able to maximize your advantage over your opponents.
Rest of the game allows you to think about the decisions taken at the tables, and modify what could often lead to negative sessions. Instead of constantly jumping to the tables in the middle of the game, spend some time away from the tables, giving yourself the opportunity to clear the mind, to evaluate and work out those potential errors or problems that may arise in your game in the future.