Very unfortunate that gamblers don't see the negative impact of their gambling addiction. These gamblers don't wonder why some of their relatives hate them and have no close friends anymore because of their changing behavior.
It's because they are focus on what they're doing and not giving attention to those people around. In this state, the gambler is already addicted or bound to be one. That's why it's really crucial to gamble in moderation and don't let gambling affect you negatively to the point you don't care anymore to what's going on outside gambling. Though it's not right, many gamblers are still becoming addicted despite the reminders since they're motivated to gain huge.
Greed is like an inbuilt feature in our mind, and it doesn't affect a gambler ones, it start gradually and if it occupies the mind of a gambler the gamble ends up becoming addicted. Greed starts true emotions, if you lose you think about your lose and it also makes you chase after your losses.