I guess every casinos as long as they have the licensed and they follow the protocol has to be allowed to operate, the resumption of businesses especially for casinos are for everyone as the small ones are the ones who suffers the most, so the government should not choose.
Maybe the attention was only centered with Las Vegas Casinos since they are the most popular, biggest tax contributor but everyone must be given a chance to start earning again. I'm sure the model will be the same for all casinos as they have the same operation, social distancing and wearing of mask are too basic ,so I don't think it will not be followed easily.
The problem is that they are not following the social distancing norms. From the news reports, I could understand that a disproportionate number of casino workers got infected during the last 2-3 weeks. IMO, the government should not allow the casinos to operate anymore. At least until there is a dip in the number of new infections. This is not the right time to allow non-essential services.