In gambling, you can have the skills but it also requires luck, if it doesn't favour you that day, you may go home empty handed and may still look as entertainment to those who only do it for fun and not as a means to make money.
If gambling is a tradition, I believe that cultural perspective must have taken it to be entertainment and not necessary must win, even from what Op says, you are required to test it to get rid of bad luck and if the outcome doesn't favour you, that doesn't mean you will fail in life. Sometimes, only what you believe can affect you, these may just be superstitious to some people.
I think if gambling is treated as a tradition of testing luck, then it should not have any negative impact on anyone. I know that there are other traditions (although they are not common in my country) - fortune cookies. I doubt that anyone seriously believes in such predictions and gets upset if they did not receive a cookie with the "right" prediction. This is nothing more than entertainment. Or, for example, there are other traditions (which are somehow common in my country) - these are Christmas fortune-telling. A lot of people do this but I haven't heard anyone take it seriously. It's just a holiday ritual.