Personality can only be changed if the person in questions morals character is questionable. This is because if you are a discipling person no matter what comes your way money can't and should not change who you are.
This is the reason it is banned in many Muslim countries and few others. This is something that the state does not allow you because after you loose all your money in gambling, you have nothing left and there comes the responsibility of the state to fund you. So according to the paternity law, the state has the right to enforce the regulations upon you.