The main reason behind peoples choosing gambling is greedy for needs and to fullfill it they chose gambling as it is the easiest way of earning high they think, but they forget that nothing is easy, everything needs skills and luck.
As you say, the greedy will behind on us in every aspect and we cannot get money in gambling, and if we can win then we need to realize that is because of our luck comes to us. We cannot use gambling as a source of income to make money and we cannot use gambling to fill our daily needs but gambling is just a part of the entertainment, and we need to use it as it's the way.