The fact is not like that and even that is difficult to make some gamblers not hunger to their money back, they gamble because there is something that the profit he sees is not just fun. This is what makes everyone an addict, they will always hope to win when betting. And I guess people who gamble are just for fun, so they are categorized as gambling addicts, even though they do gambling once a week.
The fun is what the casino owners want. They want the rollers to feel like its their home. Its a part of their marketing strategy to keep the people happy and make sure they stick around and not go away. They are there to give room to your addiction and willingness to take risk. People call it fun because its entertaining them but they have to do it for a price obviously.The addicted gamblers do have to stop once they run out of funds and this often leads to anger outbursts either due to frustration or due to being high on drugs at the same time.
