As far as I know, I haven't made any argument. Regardless, the odds of COVID-19 transmission between two people standing together without masks must be at leas

As far as I know, I haven't made any argument. Regardless, the odds of COVID-19 transmission between two people standing together without masks must be at least 1000X higher than the odds that a nuclear attack will happen while they're standing there. That's enough for me to consider the two risks "different" shall we say, and guess which one I'm more likely to prepare for. Nobody prepares for every contingency. Most people look for some value of risk reduction divided by cost. If I decide to protect my house from school-bus-sized meteorites, the chance I will bankrupt myself trying to construct an adequate shield is near 100%, whereas the chance of such a meteorite hitting the house is pretty small. Given how much more likely plain old thievery is, and how cheap locks are, I should probably prioritize just buying a lock for the front door and remembering to lock it. Just like people prone to die from heart disease or just slowly waste their lives away in traffic should probably prioritize a simpler lifestyle above nuclear war prep. However and nonetheless, note that even with the small purchase of a door lock, I've already agreed to take on a (more than zero) costly and (to some degree) onerous preparation for something that may never happen. Who knows what the chance of a burglary is; you could estimate based on crime rates. But with 100% certainty, locking the door will be a small chore every day and will ruin some number of minutes of my life. Whether it was ultimately worth it would largely be determined by the value I place on certainty. Speaking of values, they're subjective. Let's say the school-bus-sized meteorite is confirmed to be coming right for my house, with 100% probability. But let's also say that I don't care whatsoever about the house. So I will still not do anything to mitigate. That's how I feel about a nuclear attack. The chance of a nuclear attack is (some number), but the chance of a nuclear attack happening, and my giving a shit about anything whatsoever afterward, is near zero. "Will I survive?" My answer is somewhere between "Who cares" and "I hope not." So obviously I'm not willing to undertake mitigations or live in Houston. But I will wear a mask during the pandemic for example because it's cheap and easy, temporary, and it works to reduce a risk that is pretty high.