How exactly would you impose that kind of quarantine?
It’s really all about tracking and testing. For instance, a community in New Rochelle, NY is currently a hot spot. They should lock it down, identify the cases and possible exposures and clear it after 14 days. This takes thousands of tests though which don’t rightly have even though we had 2 months to gear up.
We don’t want to get into regional spread because that’s when things are going to get scary and out of control. Italy is now facing that with travel bans and widespread lockdowns.
China was by far the worst, they had entire cities under total quarantine. They were producing something like 1.4 million tests a week. We cannot let it get there.