And yes there is no reason for a person to be addicted into gambling
I'm afraid you're wrong, earning money and losing money in gambling is the two main reason why people could bet addicted to it, winning and losing can't be controlled, it will depends on how lucky and unlucky you are, once someone experience either one of these two reasons that I have mentioned, they will go berserk, if they lose, they will do everything to take back their money, and if they win, they will do everything to win more in gambling.
Make sure you watch the man bet a little and enjoy it, it's not a serious thing and no need to worry. But if a person exceeds the normal limit and has big investments, there is no gain or loss that will stop him gambling, I guarantee.