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.
The second scenario describes some kind of highly self-aware player who has no concept of addiction or wasting time. I think such cases are extremely rare, unless the player deliberately sets themselves a self-exclusion for certain periods. The first scenario, however, is much more plausible, especially when it comes to playing until the entire deposit is lost. I believe most players experience this.