Yes you are right This is just a game, but sometimes most of us treat it as a source of other income if you cannot control it you will lose, believe me. I have already been there. Haha
Maybe there is a fear of gambling addicts that if they reveal their gambling addiction to other people, they will be rejected by people, making them unable to accept it. And that's what makes gambling addicts not want to admit that they have a gambling addiction so they don't dare to be honest with other people. But if they don't care about what other people will say, they will still say or be honest with people that they need help and want to cure their gambling addiction. That will allow them to get the right treatment to cure their gambling addiction.
Also, agree with you that sometimes a gambling addict closes himself, If I had a friend like this I would talk to him because sometimes talking to other people can relieve such a burden in the back