For the same reason that, in a completely libertarian society, people will not buy police insurance and fire insurance and thus provide financial support for a

For the same reason that, in a completely libertarian society, people will not buy police insurance and fire insurance and thus provide financial support for a police force and fire company. It's too idealistic and shows the limits of the invisible hand. Governments specialize in risk externalities and black swan events, and COVID-19 falls under both of these scenarios. What's clear from all this is that pandemics and wars show the weakness in the Libertarian philosophy and yes, giving government this kind of power is both dangerous and necessary. "If men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary." - Federalist 51, Alexander Hamilton.