I see two different ways to consider a gambling session complete:
For some, it is enough to play by limiting their deposit, or until it is completely lost, for example, as the author of this topic described to us.
Some people will play online casinos until the time allotted for the gaming session is over. For example, if such a person wants to sit and play slots for an hour on Friday, then after an hour, he will get up and go, regardless of what result he sees on the screen.
You made a valid point mate, and yeah, this is the most recommended way to consider a gambling session complete. As a gambler you're supposed to have a fix amount that you will be going with everyday that's for those gamblers that can't skip a day without attempting to gamble, so that when you gamble with this fix amount which you intend to bet with for the day then, you have to call it a day or just see it as if your gambling session is over for the Day maybe to start the following day. This is how to schedule our gambling activity more especially those that like gambling from mid-week to weekend doing it this way is going to ease some stress and also make you not to panick too much.