No one wants people to be harmed or killed by a virus.
No one wants a business or it's employees to suffer.
No one wants to accidentally infect someone or become infected them self.
There is no way to tell who will be affected and to what degree so leaning on the side of being slightly overly precautions is best in my opinion.
How much blood are you willing to live with on your hands if you choose to ignore or to follow the decisions that your local leaders create and/or enforce?
If businesses close or employees immediately loose income, it could certainly cause harm or eventually cause loss of life in other ways. I suppose the hope there is that a majority of Americans will do whatever they need to do, just like always. (See LTG's post #226, down from here!)
This is all just the best that we can do with what we have to work with right now. Americans generally have a mentality of doing whatever they want... related closely to freedoms that other countries lack.
At the same time, leaders do the best they can to report and concern the public, because they think it is currently best for the typically educated American.
Just the reality of these times. You can always do whatever the hell you want. No one is going to stop you. Any action that anyone ever made in the entire history of the world can never be taken back or "redone". I think it's important to remember that no matter what, the only person you have control over is yourself.