Otherwise we could just let it spread naturally, like we did with any comparanble disease in the past. (Like every influenza season.)
Actually, a lot of the preliminary evidence is--concerningly enough--that the flu in a bad flu vaccine year may actually have a worse death rate, because the handful of places we actually do have the necessary data set to properly calculate just how deadly COVID-19 is are showing that we've got high rates of asymptomatic carriers (who are capable of infecting others but just plain not showing any symptoms) and mild cases. If those data sets are any indication, a significant percentage of cases are going under the radar and being left out of the death rates.
Basically? It means that probably, we all know somebody who has had COVID-19 without anybody noticing...and from an epidemiological standpoint, those people who are missing from most of the data sets are the ones we need to be catching because they're the ones who do most of the spreading.
Note: I am not trying to downplay COVID-19's risks here by comparing it to a bad flu year. There is a reason at the front end of this the CDC was basically trying to get some of the panic to get applied to the flu, because we don't really take the flu as seriously as we should...except when we panic and panic is just never good in a public health emergency as people with panic-induced hypochondria add to the stress on the system.
A lot of the panic is, to put it bluntly, the media trying to get clicks. I'm not really sure if they've quite realized that they're a significant part of why they're dying, we have any sort of fake news problem, and the trust in them has been plummeting. Did they watch Network and think that the dark satire of the 70s precursor of clickbait journalism was supposed to be inspirational...?