There is a lot of information out there that can make one person have a huge impact that used to be gated by the difficulty of acquiring the knowledge.

When it took years and years of training to learn how to master something enough to use it with great impact, that effort was strongly correlated with the discipline and lifestyle to not misuse those abilities.

Completely gate-free LLMs would have very "useful" answers to a nutjob prompting "How do I cause as much destruction as possible with only what I can find at the hardware store" or similar. Sophisticated guards are still very hard to do to avoid giving a whole lot of power to someone not very friendly and not very disciplined.