So what. Various attackers managed to take down large chunks of the Internet on a frequent basis before LLMs even existed. This killed very few people. The great thing about the Internet is how resilient it is.
Anyway, to your point, things can be resilient. They tend to be or not be... because we made them that way. Don't poke your bruises, and all that. Life support is deployed on-campus but relies on a single-point IPSec tunnel to us-east? Easy fix: stop that.