Apart from thinking that gambling is a poverty alleviation tool which many gamblers usually think, another worst phenomenon some of these gamblers do is thinking of being financially stable through gambling. Because I have seen a scenario whereby a person won a huge sum of money through gambling and later became broke, simply because he thought he could sustain his huge sum by consistently gambling and winning more. But to his greatest surprise he lost everything back to the same gambling system he won from due to indiscipline and greed. So having that mentality is the worst mistake any gambler could do.
When a gamblers starts seeing gambling as a means of earning a stable income, then that person is destined for poverty and frustration because in gambling you can never be winning consistently, even though you are very lucky.
Why I said that those that have such a mindset is destined for frustration is that in gambling the chances of winning is like 5% to 95% of losing, so your winning probability is just too low for you to be thinking that you can win consistently, and in addition, when you approach gambling with such a mindset, addiction is actually not far from such person, since he will gamble too often and more aggressively.
