I don't disagree with the premise, but disagree with the math. The folks with possible natural immunity would be included in the group that is asymptomatic. You can't add them together. But I get your point.Based on everything I have seen and read, my estimate is 25-35% of people have natural immunity. Combine with another 25-40% of people being asymptomatic and I think easily over 50-65% of population this has zero effect on.
Hasn't South Korea or some other Asian country gone like 200 days without a single case, let alone any deaths?