The words are true that poor people think they will earn only because of luck without hard work and they find easy ways how to earn more in less time. The poor are more attracted to gambling than the rich and they think they can become rich overnight by betting on gambling, so they rely directly on gambling instead of trading and betting and eventually become bankrupt. But the rich do away with all these thoughts, they do business and invest in real estate, gold business, investment in banks, construction of petrol pumps, housing and infrastructure where they work hard and change their situation in a short period of time. But the poor stand against it.
Not all poor people are attracted to gambling, though some may be, especially those who are irresponsible. Since they are poor, they can't really afford to gamble, or if they can, they shouldn't, to avoid becoming addicted. Investing, not just in banks, may not be part of their thinking because many of them are struggling so much that they are just trying to survive.
In short, most of them don't have the capability to invest as they are just living from paycheck to paycheck. Only those who have excess can have the option to invest, hence, most people in the poor category don't have the mindset to set aside funds because they are barely surviving. And with such capability, some of them are trying their luck in gambling, for the main reason that they are trying to hit their luck. And also, it will only require small amount of money to enter in this game.