tldr; no system failure is human error. if a human can cause this, then your system lacks adequate controls and mechanism. the root cause is the lack of controls, not the human error

Building a system without sufficient controls is a classic (human) error in system design.

I chuckled in agreement but then I started thinking if it could be actually a better term. Human error analysis might be a little blamey.. but availability design bug or something might be good.