I don't think gambling should be called a addiction it's not something bad or horrible as it's always is portrayed. Not all our alike, not even our fingers are the same size, each one finds a different passion which keeps him sane so I would call it a passion, i believe each person is sane enough to decide for himself, and so I feel each one can make his own choice without being subject to humiliation.
How can you say that gambling is not an addiction? It may be a case to case basis since not everyone behaves the same but it can be definitely classified as an addiction. The situation of others are really worse because there are those who cannot control themselves and has made bad decisions. There are some who dont even sleep or eat if they dont gamble. Addiction makes people go to a point where they literally lose everything, even their own houses. Its humiliating yet those who are addicted cant control themselves to prevent such humiliation.