For me, I think that there's a certain percentage of people that are addicted to gambling that it will eventually affect the economy but if it's not going to be a lot of people, I think that it will not affect the economy that much, maybe the local economy will be affected since there's more people that are using their money to gamble instead of spending their money regularly but a country's economy, it's unlikely that it's going to affect it drastically and gambling is a business industry that pays taxes so I don't think it's going to be a bad economy if everyone's gambling, Macau would've gone up into flames a long time ago if gambling was bad for the economy.
Paying taxes is just a small number, most of the casinos operate illegally in many countries, they are run by individuals and they often come into conflict with the law, generally the law enforcement is probably corrupt and neglects to prosecute these individuals. This gambling money will also be spent on domestic activities and the government still has measures to regulate and recover it, so a bad economy does not come from the gambling sector, it should come from embezzlement, the level of education and the policies implemented, the increase in gambling activities only promotes embezzlement.