Disease can be passed to another person or get spread and addiction doesn't do that. It could be categorized as a mental problem that range from mild to a very serious addiction on gambling.
Yeah and mental problem is a disease. So gambling addiction is disease. Well maybe you do not think of mental problems as disease, but I do. Gambling addiction must be cured, if it is extreme and the gambling addict is aware he is addicted and wants to quit, rehab can be a solution, but if you want to slowly in his own way can also work, it's just that you should be more patient and should not easily give up.
If the gambler is willing being cured then there's a lots of options aside from his willingness, the medication to relax a minds and to balance the brain was
also available, we knew that gambling addicted persons needs to have rehabilitation in order to free their minds and with the help of their willingness to
have a normal life again and their love ones support then this disease will be wipe away.