usually, instead of playing for fun/entertainment, players take it to the next level and become unreasonably serious about gambling, while i don't really recommend making it as your primary source of income, we cannot deny the fact that there are few people who will do this and a few that changed their lives into something good by playing. sometimes people forget that it was only made for fun and the stress that has been accumulated throughout every game can lead them to something they didn't want to initially such as the things listed by the OP.

i somehow agree with you that one of the best medications for those gamblers is to let them understand that they could no longer regain what they had lost, and if there's a chance they can, it will be all depending on their luck. they should also realize that once they enter the pit they will have a hard time climbing up again, and after telling them that they needed to be slowly separated to that hobby or find another hobby to take up their time slowly just like withdrawal methods for those who are under rehabilitation, but still that depends on the very person if they really wanted to still be able to change their life although things are no longer the same. in the end it is only a matter of how those people can accept the reality they put themselves into.