They can stay at home and self isolate every other pandemic quarantine since the dawn of time. This is the first time everyone that is healthy has been locked down. The thugs and fools running our country locked down our entire country and cratered the economy. The entire civilization of the West has been locked down and things will never be the same.
Quarantines have existed through history. And people have done all kinds of things to try to stop pandemics.
People can spread this virus before showing symptoms. Viruses like that are hard to contain. With the (dubious) stories about many people getting it and not showing symptoms, the task of containing the virus becomes extremely difficult.
No matter what we do, nothing is ever going to be the same. Either we take an economic hit to save lives now and adapt to a new normal where we learn to live in a way that reduces spread of virus, or we do nothing and take the economic hit of millions of deaths as the virus spreads uncontrolled—and still end up having to learn new ways to live. There are no good options. What we must be vigilant about are the attempts to impose dictatorship that the left is currently engaging in.