The only way testing is really going to work is for an entire area, then you reduce the circulation between those positive and those not. That would need alot of tests to do a million people or however many is in that area/town and then organise it all, seems like its not happening. The only real alternative is distancing and then treatment for those who become obvious in their symptoms. Since the ill wont have spread before receiving treatment that is why the spread factor goes down and control increases, at present people wont accept this is a virus which can appear as nothing while spread phase and then kill.
The two extremes are confusing people and making some believe its non existent just before they die, we've not had this unique mix in a virus or similar covid extremes prior and its especially effective at spreading in society that wont accept medical research or government statistics. It is a perfect storm unfortunately so theres no excuse to open a casino with that background ongoing, except money is more valuable then reducing the mix of people and this natural spread behaviour.
Well, I think it's a matter of lack of supplies? That's why they refuse to do checks for millions of people. Not to mention that if millions were to be checked, it'd span in weeks if not months, and such situations where the person checked was infected AFTER being checked, well, then their efforts, money and supply were wasted no? Can't really blame them being helpless when confronted with millions of people. There's also the issue of asymptomatic infected, which makes things a lot more complicated when it comes to testing obvious symptoms.
Going back to the topic which is resuming of Las Vegas Casinos and reading a few replies back, I can't see that a casino will mandate or required their customers to show test results before they will be allowed to enter the casinos. Let's accept that there is no way a certain place will prevent any infection especially for a country that establishing hundred thousands of confirmed cases daily so I'm hoping that all casinos there is strict, not that strict but too much strict in implementing safety measures.
Let's be real here, even if they were to present test results, that doesn't mean that the same result would still be accurate the next day right? Or week? It's actually inefficient even if they did try to do so. They only need to be strict when it comes to implementinig safety measures, especially since not only would their reputation drop they're employees themselves would be affected in case a positive infection gets in, leading to damages that exceed compared to them closing down temporarily.