Nitpick: Everybody will have B/T cells to kickstart antibody production on next infection, making it mild in the vast majority of cases. Antibodies naturally wane a few months after infection, otherwise our blood would turn into antibody paste in infancy.
Economic costs. For example, the US deficit in 2020 and 2021 is 3T dollars each, compared with .5T - 1T of previous years. This will weigh on generations to come. We are on the brink of completely wrecking the US economy and the US dollar.
Human costs. Spike in suicides, spike in drug overdoses, spike in crime, people disconnected from family and friends, spike in people abandoning their jobs, a generation of kids lost a year of school, mass delayed medical procedures, mass missed childhood vaccinations. Does any of this matter?
Some places (Austria, Canada, France, Germany, NY, CA) are openly forcing complete isolation from society of unvaccinated people (no work, no trade, no travel). The unvaccinated population is not negligible, 10-25%. This is on the level of crimes against humanity, surpassing even WW2 casualty lists. Is this a cost we should consider, or we'll simply dispense of 10-25% of the population with no second thoughts?
The cold reality is that we simply do not have the technology to stop the virus. We are using sand bags to fight a tsunami. Perhaps we can delay it for some time in a few select areas, but the wave is going to raise either way.
2. Do hyperrestrictive regimens perform significantly better than open regimens in the long run? What is the justification for the immense economic and human costs of hyperrestrictions?
3. The math is wrong. 0.001% of 40M is 400. Which could have been people with serious comorbidities that would have fallen prey to flu or other respiratory viruses.
4. By now, everyone that wanted to is vaccinated. Which reduces the cost of severe covid by another order of magnitude.