I'm sorry but let's just disagree and move on. Covid doesn't have a 100% death rate so not everyone will die, in fact very very few will compared to global population of everyone were to get it.
You're basically laying out a scenario where the world will have to go into a never ending period of new vaccines for new strains (there will be new strains for decades to come in all likelihood), no global travel, and economies will just have to deal with it.
Doesn't work that way. The economic impact and health impact of lockdowns, etc. will kill far, far more people (look at the overdose death rate in California, for example). This is also who Cali is now sarting to open back up regardless of covid rates.
In 2023, new strains or not, things will be mostly back to normal. They simply have to be, we have no other real choice.