Indeed, loneliness may be difficult, and meaningful activities can help. Recognizing that everyone's journey is different is vital. As you said, joining a charity may be a lifeline for some; it gives them purpose and a sense of belonging. For others, the solution may be more complicated. Consider gambling. While typically perceived negatively, especially in the context of addiction, it can be a source of social contact and leisure if done responsibly. I've known people who enjoy occasional, limited gambling and community. Balance and self-awareness matter.
While avoiding casinos is a good idea, not all gamblers become addicted. Some use it to socialize and get a thrill. The objective is to promote healthy gambling and provide support for those who need it.
At least each person should be able to find a way to overcome his loneliness and instead become interested in gambling, especially if he has good memories of the past when he often gambled. A lonely person may reminisce about the past and think maybe I can go back to gambling to see if I still have good gambling skills. It can make them return to gambling and there is a possibility that they will become more enthusiastic than before. If they don't have good self-control, playing gambling again will be a disaster that they don't realize so they will only experience a gambling addiction.
But when he realises that his return to gambling is not something that should be done too often, he will not experience any problems, and he can even enjoy his gambling moments. He also won't gamble too often because he realizes that he can be addicted to gambling so he will try to find other things to keep busy rather than just thinking about gambling.