I understand moral arguments but also see how others might not. I think it might be more useful to view this from a societal perspective. Is it to society's benefit to ensure gamblers don't ruin their own lives? To answer that question, what's the cost to society when a gambler ruins their life?

Lost savings means an impoverished individual and potentially an impoverished family and children. These draw support resources from the state and community, are more likely to turn to crime, and are less likely to develop into contributing members of society.