But what you ignore is my question "why did no other country do as you suggest?"
Several American states such as Florida did, and I have repeatedly answered this for you, and you have totally ignored it
Might be wrong but Florida isn't a country, i ignored nothing.
Florida had a death rate similar to the worst performing state, it wasn't too far behind and overall, the USA saw over 1.1m deaths.
There is some limited research that Asian countries were more compliant with instructions, early mask wearing, draconian LD's and tracking of movement via phones and credit cards and that genetically, had a higher immunity to CV than Western countries.
We ve all had CV recently, all vaccinated all under 60, my partner bought it into work, where around half (8 in the office) went down with it, all had time off and a few inc me & partner are still coughing/or fatigue/chest pains 2 months later, i accept this is all anecdotal.
I just don't buy into your narrative that there were easy answers and solutions to the situation in 2020.
Personally, i'd look at how Germany handled Covid, far lower death rate and less damage to their economy/lower Govt borrowing costs too, our experiment with Truss and gilt yields have cost us dear, even pre Truss.