This is like saying that people who lost everything in trading go into crime...I doubt this is the case.
Gambling owners can make the gambling environment decent and crime free if they want to. Some are probably encouraging that kind of environment to attract more gamblers.
Crime can be a side effect of gambling habits and can be done outside the gambling environment. Even though casino owners can make a decent and crime-free gambling environment, it's only a view from one angle. Because bad gamblers can commit crimes in other environments and bring the money into the casino.
I agree, well it is true that gambling owners can make the casino environment decent and crime free but once the gambler go out of the casino there is a possibility they can commit crime and I think it is already out of the control of the casino because it is already outside their premises. But we dont know for sure some maybe going crime inside the premises.