I'm aware of the principle, but that does not answer how that would have helped them here or how this indicates anything about the quality of the entire code base. Nothing in the writeup suggests that they had difficulty understanding this particular piece of code or that they were searching for something specific but didn't find it due to bad naming.

Exposing this value as an external configuration parameter in a place that is more often looked at might have helped someone to realize caching might be an issue earlier, but it could easily have been ignored as well.