That's why gamblers have to think about the long term financial risks if they really can't quit gambling. It's okay to gamble as long as they are responsible gamblers, but when it's done without control then they get into trouble.
Gamblers can try various features offered by casinos, but the risk is still there because actually losing is a certainty that must be experienced by gamblers while winning is a hope that is difficult to achieve on various occasions. So be a responsible gambler, meaning they have to understand the risks.
Who said gambling will always be loss in future? There are both way returns like profit/loss and you need to be sensible gambler to balance your situation well and that's it.If you are not professional then you can enjoy with your small bets only.
You just don't go beyond your limits and keep up your budget if you don't want to end up in worse situation and play in well manner.