Thats the fact, casino's losing huge funds is not something that happens steadily while for a gambler losing money to the casino that aspect is on a daily basis and that's why casino's dont come out complaining like the way the gamblers do.
This is simple, casinos are companies, businesses that have the house edge and it is something accepted worldwide, even we when we play we must be Aware of it , Personally the casinos always win and we as players are consumers, it is not that we will never win , if we are lucky enough we will win.
The fact that casinos are a kind of "business", they should expect profits. If casinos lost money like the gamblers do, they could've been bankrupt a long time ago. The booming casino/gambling industry and the continued growth of the number of online casinos are one of the major indications that this business is very sustainable. There's no way a casino will lose if they have a huge number of clients.