Coronavirus public policy

I have no public health expertise (e.g. MPH), I'm just thinking out loud here:

1. As far as public policies go, I think it's a bad idea to have a one-size fits all policy. I think it's better to tailor a policy to certain locales. Some locales might have low risk of coronavirus transmission while others are hot zones of coronavirus. As Steve has pointed out in the past, we should treat like cases alike, but unalike cases unalike.

2. What's more, there'd be less harm to our economy overall if many or most places can keep things "business as usual". For instance, not that I'm necessarily advocating this, but I'm at least using this as an illustration: if only impacted areas in a city shut down, but other areas remain open, then the city could still be productive and our economy less hurt overall vs. the entire city on lockdown.

3. I guess there's a tradeoff between how much we should take preemptive measures vs. how much we should take reactive measures. Perhaps there's no need to take preemptive measures if there's zero evidence of anyone sick with the coronavirus in the area. Perhaps places with no evidence of coronavirus can get ready so if there is eventual evidence of coronavirus in their community, then they can react with speed and purpose.

4. People argue there could be asymptomatic coronavirus carriers walking around in our communities. However, should we take preemptive actions like closing down stores and restaurants for this possibility? Isn't that sort of like worrying there could be a serial killer in one's community, therefore shut down everything, and let's start a man hunt?

Granted, it's an imperfect parallel. For one thing, there (hopefully) aren't many serial killers as a percentage of the population, whereas I've seen high percentages of how many could be asymptomatic carriers. Still, I presume that would more likely cluster rather than be diffused across the entire nation. More likely be nearer to where the outbreaks and hot zones are rather than across the entire country or even regions of the country. At least at this point.

Of course, if the virus has spread across the entire country, then that may call for different strategies. My concern is people are already fearing this without hard evidence of this. My concern is we're getting ahead of ourselves. My concern is that people are acting like there's an asymptomatic carrier hiding behind every tree or bush when that's not entirely clear to me.

5. At most, if we want to take preemptive measures, then why not far less dramatic or drastic preemptive measures? For instance, point-of-care testing at clinics alongside wider surveillance of affected regions. Stuff like that. And otherwise more or less business as usual.