> Knives seem like the perfect example, really. We do leave them lying around in our drawers, usually under zero real security against any malicious guest, but we recognise it is about the choices of the people we invite into our houses, not the existence of the knives themselves, that is the real danger.
The problem comes from the scale, it is a knife vs nuke question, but you seem to stop a bit too short in your reasoning. Yes both can kill, they just don't operate on the same scale.
You could forge documents 400 years ago, it doesn't mean it would be ethical to release a software that let you forge any document at scale instantly and for free in a single click
One steam engine is a marvel, 1.4B ICE cars on earth is a nightmare
It's always about scale, almost never about the original purpose/intent of the tech. Modern tech develops and spread infinitely faster than anything from even 20 years ago