> These countries you mention are vastly different in terms of population size and geography.
Yes, South Korea and Australia span the gamut. So do Taiwan and New Zealand. The USA is somewhere in-between.
> Also, pretending that there are no costs associated with strict lockdowns is terribly flawed.
Those costs are largely suffered by this lockdown-reopen-lockdown cycle, without the benefit of getting rid of the disease. Indeed our trajectory is worse economically, because there's no light at the end of the tunnel.
Life in Taiwan and New Zealand goes on pretty much uninterrupted right now. We could have had that. We still could, if severe actions were taken.