Data and content related to "biological weapons" already exist on the internet, in books, etc. The real issue is access to facilities and tools. There are models that help researchers, but they are not LLMs, rather they are models trained specifically on biological data (like AlphaFold).
Cybersecurity is basically used like a dog whistle pioneered by Anthropic to achieve regulatory capture. Otherwise, the widespread availability of good tooling for security analysis would eliminate more of these cyber threats, rather than gatekeeping them for a few private companies.