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.
I suppose that at the end it is a matter of your personal preference, since I make an effort to keep track of all the money I deposit and withdraw from a casino.
But being completely honest, this is something I do with all my money, the reason being that unless you keep track of every single dollar you are spending, it is difficult to notice where you could make some adjustments that could allow you to spend less money, while at the same time you maintain the quality of your life.