China fought the virus by enforcing social distancing to an extreme you don't want... they welded morons who were going to leave their houses into them and covered the highways with mounds of dirt to stop people from leaving their cities. The death toll and number of cases there is likely underdone (though I'm not sure I believe its as dramatically underdone as others, hell, our case numbers and fatality numbers are way underdone), but they stopped it through social distancing. They aren't out of the woods yet though, other countries could bring it back to them.
China instituted strong social distancing and, you are right! Massive drop off! That is proof it works. Jesus.
I'm sure China is laughing at the U.S. response, I know I am.
Yes, everyone catching the virus and getting immune would solve the problem quickly. But also millions of people would die. So weigh that how you will.