Zero Covid may actually be plausible for small, isolated island nations with limited entry points, like NZ, even without locking everyone inside their homes like in China.
And it's probably wise for countries to be using COVID as a test run for something worse. We live in the age of pandemics now, and will probably get hit by something worse eventually. Something like an airborne Ebola strain (50% mortality) or airborne Rabies strain (100% mortality) are going to require a rapid, whole-of-society response to shut it down. If anything like that happens, the US and other countries that made a complete wreck of our response are going to be fucked.
And it's probably wise for countries to be using COVID as a test run for something worse. We live in the age of pandemics now, and will probably get hit by something worse eventually. Something like an airborne Ebola strain (50% mortality) or airborne Rabies strain (100% mortality) are going to require a rapid, whole-of-society response to shut it down. If anything like that happens, the US and other countries that made a complete wreck of our response are going to be fucked.