I think that in the situation described by the author of the topic in the start post, the causes and effects are reversed. People work hard not to play more or to have the opportunity to lose more money on slot machines. Here, the pattern is most likely the opposite. People work hard to earn a lot. But hard work is hard and stressful. To relieve stress, people simply play more. Therefore, I believe that the definition that people play for fun is not entirely correct. In this case, people play to relieve stress.
I think everyone's goal when gambling is probably the same: to win, but everyone's perspective on gambling is different. Some gamble to relieve stress, as you said, or simply to have fun and double their money. But of the many people who gamble, it's likely they're doing it to double their money. Even those who gamble for fun, I'm sure they have a desire to win.
Regardless, I support those who work hard to avoid losing a lot of money in gambling, or in other words, to reduce their gambling. But what's ridiculous is if someone works hard and their income is allocated to gambling.