gambling is a trap for people who has greedy attitude and those who are desperate to want a faster increase in life.
Obviously, but we can't blame gambling for that as gambling exists for the purpose of entertainment, so as a gambler, we should be aware of the risk and in order to get away of the risk of getting addicted, then we follow the basic requirement which is to be responsible.
It sounds so simple but I know there are people who struggle doing it, but it's their fault, not gambling, and in the first place they should not gamble at all since they don't have the discipline.
It is not really greed IMHO, it is more like a click in some people´s brain that lead them to feel a strong stimulus when winning and not much of a pain when they loose. They appreciate two equivalent events differently so earning 50 makes them very happy and loosing 50 does not make them sad. Thus, an advice is to limit your gamble time, for example, gamble 1 hour a day and make sure that you can do so sustainability within your budget.