Their decision for reopening of casinos today is for the sake of the economy and the jobs of thousands of people. Basically, if we resist to lock ourselves down, the country will not be productive and the economy will fall. If we will implement strict sanitation, we might somehow lessen the spread of the virus, but the best response to this case is to stay at home and utilize alternatives such as gambling online and watching TV. Though the fun isn't the same, we should acknowledge our situation and do the best way we can to lessen physical interaction.
When the vaccine is out in public, I'm pretty sure we can go back to the lives we have before.
This is a very hard decision to open the casinos again and only time will tell if it was the right one, or will lead to higher corona numbers again.
I am not a 100% sure, but I believe there is no vaccine available yet. And even if they scientist found one, it will still take months to mass produce it for the hole population.
In the meantime we need find away to have the economy running, but also protect those most vulnerable to covid-19, old and sick people with preconditions.
I believe humanity will find a new normal state though this crisis.