If not talking about the first time loss gamblers that later become addicted, what you are saying is not completely true. If we can do a survey of gamblers that won or lost in their first game, the people that will chose won can not be 100%. They might not be 70%. It may be 50%. Some people will gamble for the first time and lose and continue to gamble. The main reason is because they think gambling is a way money can be made. Unless they change their the way they think about gambling, that gambling is is not a money making means, first time win or loss is not necessarily the cause of their addiction.
Gamble with the money you can lose.
Your observation that the main reason why people become gambling addicts is because they see gambling as a major source of income. The belief that they can earn a living through gambling motivates them to keep gambling until they lose control. You are also correct OP that until these people perceive gambling as entertainment and don't depend on it for survival, they might end up becoming addicted.
I noticed there has been some topics about how first time winning is dangerous. What I am saying is someone that has not gamble before, to gamble and win. That it is dangerous. Yes it may be dangerous because the person may have the exciting mind to gamble more and lose. But that is not the whole true story.
I also commented on the thread you are referring to, but what the author of that thread talked about was how a first win could entice first-time gamblers. However this might not be the main cause of gambling addiction because they will learn within a short period that it is not possible to win consistently. But I think what the author was trying to highlight is that newbies shouldn't be deceived by first wins because gambling is an unpredictable terrain.
