I live in Japan and work in Tokyo. In Japan, it was possible to identify infection routes regarding the earlier cases. The newly reported cases on March 28 was about 200 against 126 mil population nationwide. We are seeing more of cases whose infection routes cannot be found. In Tokyo with 11 mil population, the new cases were like 40, 40, 60 for the past three day. We are facing the phase where we may or may not see overshoot of infections.
Maybe you know all of the following ...
In US, my understanding is that infection routes were not identified from the beginning. Infections occurred and spread nationally while the big cities in New York and California are suffering more right now. This infection pattern should be considered to be very serious and dangerous, just because it indicates the virus is traveling freely within US.
The danger of COVID19 lies in the fact that there is no medicine and no vaccine. It take 18 months to develop vaccine. COVID19 can spread very quickly and puts older people and those with chronic illness at a greater risk. Also young people may not show symptoms even after they are infected with COVID19. That means those young people spread the virus unwittingly.
These facts and nature of COVID19 are very ominous because overshoot or sudden huge surge of infections is really possible. Hospitals can cure patients if it is only a dozen of infected cases in a serious conditions. But if it is 100, 200 or 1,000 infections on a given day, the spread will not stop. COVID19 can completely break the healthcare system. I saw a New York Times video posted by an ER doctor in New York. There are 200 ER patients on a normal day. It's 400 now. Ventilators will not be available until death makes vacancy.
Because there is no medicine for COVID19, the only preventive action is stop physical infections among people. This hurts economy very much. Small businesses will face live or die situation. But if we just let infections happen, there will be more casualties and we do not know how many lives will be lost. While the state of Hawaii still has a small number of infections, Governor has called for closure of business and suspension of visitors. Hawaii depends upon tourism and visitors from around the world. I believe the state government put the priority on stopping spread as early as possible. Hawaii may not be able to survive if they just see spread happening.
I understand people have different feelings, depending upon where they live. However, the preventive actions should not be considered to be over-reacting even if they are extreme and harsh. Likewise monetary support from the government is essential to prevent spread and economic crisis at the same time. Understanding such salvation is very risky and and may distort economy further after long money easing (QE), I hope government (not only US but also Japan) will distribute the support to those who really need it.
What we can do to stop spread is --- Minimize time to go out and to meet people. Not to go to places where people gather (churches, restaurants, bars, etc.). Wash hands. No shake hands, no hugs, no kisses. Rinse your mouth first and gargle. Not to to touch your face when outside.