Gambling isn't beneficial for everyone my guy, gambling is not a sure thing to get it's always 50% in any kind it's just either you lose or you win. And from that case, half of people in gambling industry is losing while the other half is winning, so I don't think there is benefit for everyone in terms of the money aspect. Maybe, just a maybe they are getting any from it beside the money for example the lesson from their past lost.
Sometimes the percentage can be lower than 50%, but that still winning for you, so you can stop gambling at that time before you lose that win money in another round. But the half people who win the money will not too many compare to the people who lose their money because those winners know when they need to stop after winning. If they can realize from their story of playing gambling, they really got a lesson on those gambling games, but many don't learn from their lesson or other people lesson.