Actually, gamblers who have had thoughts like that for a long time, friend, but in reality cannot completely stop gambling, it could be said that they are already addicted to the gambling games they play.
It's true that when you win or lose, it's true that someone should stop gambling at the right time, but it's not easy for someone to do that. By controlling themselves in gambling, they will slowly reduce their gambling and prevent major risks from occurring in the gambler's life.
If they can't stop gambling, it seems they have started to become addicted to gambling. It will become more difficult if they do not try to control themselves but instead gamble more often because they can become more seriously addicted to gambling. They must be able to realize that they have started to become addicted to gambling, so they should not gamble for too long to reduce their gambling activities.
Winning and losing can make someone return to gambling because the temptation to get more wins or to recover their losses will come. And that will make them want to keep gambling even though they have experienced loss before. That's where we have to realize that it is difficult to stop gambling, but if they have a strong desire to stop gambling, they can stop gambling on time.