Anyone is free to see gambling as a source of income but when they lost all their income to gambling, they probably would realize that it's not a place to make money consistently. Even the name already tell us that this active is base on probability and luck and there's no certainty that a gambler will constantly win, one can be consistent in playing, hoping that one day they can win a huge amount but while doing so, better to just be risking a small amount they can afford to lose.
That is why gambling is not carried out as one of the activities to generate consistent profits because we realize the level of probability and luck that cannot always be on our side. But for people who are addicted, they think differently and they carry out gambling activities hoping to make money consistently. This is where many people make mistakes so that it is difficult for them to control themselves not to get involved in gambling excessively and that is a fact. Betting in small amounts and if done excessively will also have a negative effect because psychologically it will affect them to continue gambling.