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As far as I watched interviews with addicted players, the outcome of their addiction is 90 percent loss of family. No loving woman will calmly look at how the living conditions of their married couple are constantly getting worse, until furniture or appliances disappear from the apartment. Nevertheless, if an avid gambler comes to his senses and decides to change his life for the better, then his wife (or girlfriend) will always be happy about it.
After all, our women believe in us, and very often this is the reason for gambler to look at himself from the outside and realize how much the addiction has changed life for the worse.
And if there is a small child, then he can be a very strong motivation for the player to change and be treated. After all, there is no reason in this world stronger than taking care of your child.
So, we're invoking evolution to justify gambling addiction now? Humans, throughout history, have indulged in activities that provide immediate gratification, irrespective of the long-term consequences. It's our primitive wiring. Yet, aren't we, as Homo sapiens, supposed to be more evolved? Your argument is paradoxical! Just because the partner or child might be a reason to quit doesn't change the fact that the addiction shouldn't have started in the first place. We need to take responsibility for our actions, not hide behind weak justifications.