In general, gambling is not important for society because basically it will have a negative impact and harm yourself and other people around you, but on the contrary, if a country legalizes gambling, it will actually benefit that country, because of the possible taxes that bookies have to pay to the government.
However, it is different if the gambler is said to be a professional gambler, it is very likely that he always gets lucky or wins and loses a little.
Dont forget that once gambling is legalized in a country, there will be many casinos which means that there will be many new job vacancies to apply. Dont you think it is a benefif for the society?
For me gambling legalization will not only give benefits to the government, but also to the people around to be worker in the casinos.
Some people can even open small business close to the casinos , lets say money changer so foreigner can change their money in the money changer before entering the local casinos.
I think casino are mostly dominated by Asian and other parts of American, maybe because they have this physical casino everywhere and they don't have to deal with insecurities and the revenue generated increase the GDP of those countries but here in Africa, people don't play casino games too much, reason is that they don't know how to play this games and you don't want to bet with something you don't understand. Instead, they prefer sport betting, an average gambler can spend half of his day in any of this physical betting shop just to keep himself from been idle.
Gambling has help the society especially the areas where there have been low employment, they use it as a source of income, try some luck and get the money to take care of the needs and put food on the table. One thing with this group of people that practice gambling for taking care of needs is that once they have started, it's a point of no return. To believe that they love gambling as source of wealth, there are some of them that have used gambling to build houses.
However, the government has made it mandatory for license gambling companies to show prove of their revenues in % of what they have earn and loss. You will be surprised that these betting companies triple their revenue in every quarter, this shows that overall gamblers losses money, only few of them end the quarter with profits, the rest are just doing try and error with nothing to show.