This all sounds well and dandy, except the best data we have for covid-19 shows a .2% - .3% infection fatality rate, about 2x or 3x worse than the seasonal flu, which is still -- as we learned in May 2020 -- highly gated to people with severe age- and weight- related comorbidities.
In short, comparing this to chicken pox or other epidemics with "massive body counts" is flatly asinine. It's a slightly worse version of the regular flu; always has been, seemingly always will be.
Fwiw, I've been saying the same thing for 1.5 years now, which is what the original data reflects, which hasn't changed since then. Whenever we get new data that changes our understanding, we should reevaluate at that point.