In self defense, as I'm a member of that expendable group, influenza has a somewhat successful vaccine, and a treatment protocol that is somewhat effective. It is not as contagious as the coronavirus at this point. This mitigates its effect on society. Whenever we have developed a somewhat effective vaccine, and treatment protocol, for covid-19, we will be able to let it run its course without kneecapping the economy.
A compelling perspective:
Here's Why Herd Immunity Won't Save Us From The COVID-19 Pandemic