Because psychologically, gambling shows all the emotions in the person's soul. Which of course is influenced by whether the results of agmbling are good or bad. The worse the results, the more emotional it will be, you will get angry easily, your emotions will be unstable, and it could even end in criminal cases.
On the other hand, if gambling activities can provide a lot of money, then it will make someone even brighter. But if we look at their faces, there will definitely be changes in their emotions and stability.