However, if a person gambles for fun and entertainment while having limits and a budget, they are usually under control and have good control over their emotions.
Didn't you know that "entertainment" is dangerous?
So much entertained by gambling that these people don't realize that they are now slowly reaching the level of gambler from casual, to regular, to heavy, and will end up addicted. Since they are gambling for fun therefore they want to continue that fun. Since it's gambling they will throw away money here just to make fun. I don't think these people will have good control over their emotions. Regardless of the purpose why they gambling, emotions are part of it, and no excuse. If these people who considered gambling for fun will win at some point, for sure they will continue. If they lose, for sure they will attempt to chase those losses. Not much different from those people who treat gambling for other purposes.