Limiting funds may not bring effects to addicted gamblers, but it can be one of the ways to prevent addiction. Moreover, this way can avoid us from playing excessively in gambling and also prevent debt/loan.

I agree that family or close friends who can help an addicted gambler. Those people know more than others. They have a higher chance to make the gambler to recover from addiction. But sometimes, they also need experts or professionals of mental health as the OP said.