That doesn't address the bewilderment. No one is confused about what the tsunami of cynical skeptics who pop up on every thread like this are saying. We get it. We understand what you think is happening.
What's bewildering is the absolute lack of recognition of the fact that IF participants are locked in an arms race, they cannot act unilaterally to disarm. So not disarming doesn't actually say anything about whether they want to.
Now, of course a company not disarming (pacing the frontier, in this case) is not evidence that they ARE locked in an arms race. Everything hinges on the question of whether it's an arms race, and I think there's a great discussion to be had there. But the cynics never even bother to address the question.
All that said, I'm not actually bewildered. HN is way too smart to not understand all this, so my conclusion is that the people talking past each other are having a different emotional reaction to what's happening in the world. The angry bitter cynics are reacting from fear and hatred, and that's where the sloppy motivated reasoning comes from.