We have things in the air all around us that are small, stay floating in droplets well, contagious, and self-replicating (viruses). We know how to make things

We have things in the air all around us that are small, stay floating in droplets well, contagious, and self-replicating (viruses). We know how to make things that are lethal in incredibly small doses. Compare to this, which is not likely to stay in the air well, not self-replicating, and not-contagious, and would require larger doses for lethality. Sure, we should be careful with any new technology, but the options to weaponize this or to have unexpected bystander externalities seems really small compared to other established technologies and risks we bear.