Yep humans and civilization are subject to the same model-collapse phenomenon as they interact more with LLMs, but engineering knowledge has always been held by a small minority with certain personality characteristics. Maybe the minority will get smaller but I'm not sure it will completely disappear. There's always people like yourself building archives.

There are plenty of AIs that are immune to this because they're trained on something that won't be flooded with slop. E.g. robotics, self-driving cars (both trained on real camera/sensor inputs) or programming/proof-assistant stuff (trained on things that are verifiable).