This fallacy is distressingly common. That's not the way logic works. The contention above was that it was impossible to mitigate the spread of covid. I provided an existence proof that it was not. It's not on me to refute every contradicting hypothesis. It's clear that Korea did something right, and people interested in techniques to fight the virus would do best to study those actions instead of make excuses for why it must have been something else.

As far as natural population immunity though: that's just wrong. It's a novel virus (c.f. the initial outbreak in a nearby east asian nation), everyone gets it. Korea has absolutely had rapid outbreaks too (the church group got a ton of press early) that show that covid can spread rapidly there. They just handled it better.