I have not seen any case of gambling addiction seen from the angle of being spiritual motivated. It's just like other types of addiction like drugs, alcohol and others. It is best viewed from from the angle of poor mentality than any other thing. It is poor mentality that leads to greed, desperation and all negative things that manifest as gambling addiction.
This makes more sense, i agree with you. In this context, those who are addicted to gambling are more mental than spiritual, greed that can never be controlled so they always feel insufficient when they win, thinking they can get more without realizing it is a greed that leads to destruction.