You can wake up a sleeping person but no matter how hard you try to wake up a person who is pretending to sleep, he will never wake up. If there is a gambler around you who has become addicted to gambling due to excessive gambling, you can try to get him out of that addiction on your own initiative.
For example, the free time you can spend with him in physical sports, you try to create a good relationship with him, hoping he will understand his mistake and when he understands his mistake, he will definitely be able to come out of this addiction by his own efforts.
Unfortunately, the whole paradox really lies in the fact that an addicted gambler must only realize that he is ruining his life. No one will be able to convince him because then this gambler will simply nod and lie that he realized his mistakes. Also adding to the complexity is the fact that after a severe addiction it is impossible to fully recover.
The experience of addiction remains with the gambler forever, like a sleeping virus, and the gambler should not provoke himself into gambling, diligently avoiding the casino. Otherwise, a new period of dependence will begin.