On this point I agree with you, it is very true. Gambling addiction is very different from other addictions such as drugs, which is clear by just looking at the person we might already know he is a drug user, but for gambling it is not like that. Gambling operates below the human consciousness, and the effects of addiction are also barely noticeable. It involves the feelings and psychology of each person, only they know about their addiction, and maybe their close friends also know but not for others. I am an active gambler but not too much, and I have a friend who is very ambitious and gambling, he is so addicted that he seems to consider gambling as part of his life. I'm sorry to see him when his finances really fall apart because of gambling, I will always try not to get too far into gambling. So the point is that only the person themselves will feel the impact of their addiction and other people will not be able to see something that they are suffering from because it is not the physical impact that they feel but the mental and psychological.
Well, i can partially agree with you because what you said can be indeed attributed to some gamblers, the truth of the matter is that, as humans, we all have different personalities, behaviors and attitude to things around and in us, when addicted to gambling, some of us are indeed able to keep it to ourselves, and also have the ability to not let the addiction drive us into doing other things that can be harmful to our body system, like taking drugs and drinking alcohol.
But for some other people, being addicted to gambling go hand in hand with doing drugs and alcohol, they tell you that after loosing so much to gambling, the only way to calm their self down and not think too much about the loss is by getting high on drugs and alcohol, we have so many of such people in our different societies.
Usually people who have addictions will be more open to people who have addictions too. It's like an environment, because maybe they are too embarrassed to tell people who don't gamble at all. However, they feel that if people who have the same addiction they also have the same problem. In fact, it will not solve the problem at all or even they will be even crazier because they have friends who if they are destroyed they will be destroyed together.
Usually if their friend has the same problem such people don't want to let their friend get better and avoid addiction. And they try to stay in the same hole.
The real problem comes from ourselves, not from others. It's up to us to realize that and make it a boundary so that we don't continue to be in situations that make us difficult.
If we're already at that point, maybe our addiction only lasted 3 or 5 months, but we have a very long way to go.
I have witnessed someone who was successful in his business can fall in a very short time, even leaving debt, He started a business from 0 and I was the one who witnessed it, many people gave appreciation including me, because his hard work paid off sweetly. But in a matter of months, the business that he had been building for years went bankrupt.