I think gambling doesn't have any good good effect it has only bad effect first you can win money but farther you will lose all money which you won and which you have personally...
Then what you call the effect of winning money? is that a bad effect? well at least that's one of the good effects that gambling can ever do.
I won't say that it doesn't have any good effect, there are people that if there's nowhere to go and they are in the time of needs. The only thing that they can think of is to gamble and do YOLO.
I think winning can also mean bad effects, I think victory can bring you back to gambling again and again, because it's like poison where you want to repeat that win again, the most important thing is self-control so that whatever the results don't become a bad effect
But the thing here is that, if there are a lot of bad gamblers who are addicted to gambling, they are becoming the lesson learned people who those that don't gamble can be a model, model that they should never ever do to them selves.
I guess there is another effect that I can see on these gamblers but I am not sure if it is an effect or just a usual type of gamblers. Most gamblers I know usually are easy go lucky person. They usually just go all in into something without really thinking about it and always thinking that they would be earning something from it even though they won't really.