Gambling, fortunately, is an industry that benefits many people and every time a casino closes, many people are "screwed" who were not addicts like your family member.
I do not carry a signature from a casino, but the mere fact of carrying it does not make me participate in its intentions, but if I were under a conviction like yours I would not carry it, games of chance are not the only danger ones that exist to "harm" to those who, due to lack of control, as with any other type of entertainment, can find themselves involved in unfortunate situations.
Currently the music and visual arts industry is harming so much that gambling addicts would go to the bottom of the list, but we have a cultural influence that, since it is not instantly reflected in someone who loses money and then He falls into drugs, alcohol, etc., we see it out of the corner of our eye, as if we sense that it is wrong but we let it pass.
With gambling and bad influences (those that come from wherever) there is only one cure for those who are badly influenced by them, the moral and cultural formation of each family, studying to prepare, etc.
But for the sick person, the one who, despite having a good moral formation, like that colloquial phrase "fell into drugs and was from a good family...", well, when you are born addicted you cannot change it, but the one who falls into the addictions and has moral training, family support, this person have will to get out of that background.
For the sick, it is not as easy as in the case of mentally healthy people who falter and if they fall into addiction they overcome it, so for the sick, true symptomatic addicts, despite everything there is light, they can lead a normal life. , but they should never be near products or services that cause addiction, it is those people who should be told; "not in a casino" or like your title " Gambling game is not good and YOU should stay away from it".