But the duty of a biowarfare researcher developer would be to make the weapon, and they have. And the deity in the BG would assuage their concerns about this, just as the deity in the BG assuaged Arjuna's moral concerns. We could plop in the biowarfare guy and have the exact same dialogue.
Do you know of any biowarfare researchers who actually subscribe to the authority of the BG?
It's not like just anyone takes to the BG as an authority.
We may speculate about what BG applied to all sorts of persons could imply, but the fact is that relatively few people see the BG as an authority.
As an analogy, we may speculate about vegans who work as butchers. And sure, there may be a few vegans who work as butchers, but generally, vegans would not take to such an occupation. Not just anything goes.