So it means that those addicted gamblers will want to go physical casino to play gambling and will not care about their health. If they got infected by covid-19, whom they will blame ? This means that gambling addiction will be another reason for the cause of covid-19. Why not play gambling online and avoid visiting the physical casino ?
Not necessarily. There are still gambling addicts even in Online gambling, and anyone wanting to go to physical casinos to gamble doesn't mean that they are addicts. A casino could also said to be similar to a meeting place which can be used to meet up with other people. It isn't as simple as Online gambling and Physical gambling after all. It's like how Mobile gaming differ from the immersion that PC gaming can offer.
The bigger casino doesn't want to see their reputations damaged because of the small mistake, so they make sure that they can handle their environment. Maybe they are placing their employees as gamblers, making sure that everything can run properly and make money from their place. A gambler who only want to enjoy the game and having fun in the gambling will not want to think anything. They will let the casino handle everything.
What's the use of having employees pretend as gamblers? If they were found out, it could easily be seen as a way to manipulate the mindset of the customers that gamble. An easy example would be the employee pretending pushing the others to play with him and the like. Just let them be a normal employee, there are cams all over the place after all so any suspicious activity could easily be seen, as long as no blindspots are made that is.