I feel like your comment is relying heavily on bad heuristics (the entities capable of using LLMs to create weapons aren't all individuals) and you are making assumptions that the same "strictly controlled" regimes are in place.

It's worth verifying whether the US, OECD countries, UN, etc will have sufficient regulation over suspicious purchases, for example, after DOGE and funding cuts. This will be an ongoing issue as sovereign debts and bond yields squeeze out spending for other government regulation.