Gamblong for fun and gambling for money are different. In my opinion, the second variable allows you to track gambling progress compared to the first variable. Tracking progress isn't important to me, it's just a waste of time.
The main purpose of tracking has many versions, partly to limit himself in gambling based on the time he has set. For example, if in one month he doesn't want to gamble more than $100, tracking the deposits and withdrawals he makes will help manage this information. But he need to be consistent in continuing to update data every time making a deposit or withdrawal.
Indeed, for those who are able to control their finances when gambling, this will only a waste of time. However, it's a good idea for those who can't gamble for fun, to keep track of their gambling activities so they can control their limits.