There is one way for you to be able to overcome gambling addiction and I think it has not been mentioned by other people here, for the additional points you give in your argument, and this is also important in my opinion, when you work never save money wherever you can access , entrust your finances fully to your family, mother's wife or anyone you can trust to hold your money, and you want to stop gambling then they will understand what they have to do to help you quit the gambling addiction.
I give this advice to my neighbors, and that is effective to this day he has succeeded in eliminating gambling addiction fully.
This may have worked for your neighbors whom you did advised but isn't a guarantee that it's going to play out same way for another, you have to understand that there are different levels of addiction and so they also demand different types and levels of elimination so the remedy will be different but a professional help has been proven over time to have worked so well that many gamblers have been able to scale through gambling addiction and turned a new leave after, so it's become a well pronounced and recognized.
We will not know the results if we don't try it, I also have the same thoughts as you that it is possible that it is not effective with others, but when we haven't tried it we will not know how effective it is to those around you who are addicted to gambling or even self You yourself, isn't that like that?
Professional assistance is indeed the best way but make it the last way after the business you do is unsuccessful, honestly bringing professional people to cure someone requires money, and yes before that then look for ways so that you do not pay more for healing in an alternative way Can be tried by people around you.