Continuing the theme that people sometimes spout nonsense and you notice this. I would say that for me the number of WTFs per unit of time is one of the main metrics for evaluating literally everything around. For code quality - it works, for people - it works, for the company where I work - it works, for an article on the internet - it works, for a talk from a conference - it works, for any unfamiliar thing in general it works, an absolutely universal thing.
Code quality - the canonical example from the well-known picture, is determined simply by the number of questions you need to ask before you understand what's happening. The fewer - the better. This is clear here.
When, for example, I conduct interviews, I usually try to just talk with people "about life", sometimes going in to probe knowledge deeper. So, there's nothing worse than hearing in response some nonsense said with a confident face. If this nonsense was caught, then this won't end with anything good. It's not so important to me that a person doesn't know something as that they didn't spout nonsense. In any situation it's better to say "don't remember", "don't know", "haven't worked with this for a long time", or generally stay silent. This way you at least don't increase this WTFs/minute metric.
The same thing, in principle, is also present in more informal communication. When you get acquainted (personally or indirectly through some of their works or interviews) with some new person, this metric clearly arranges people in your head into baskets from "very cool dude, want to listen and communicate more", to "would be ashamed to even say such things".
A couple of wrong words at the beginning of an article on the internet, from which a WTF arises - the tab closes. A couple of unfounded theses in a talk - viewing stops. And so with everything possible, optimization of consumption by metrics!
Almost sure, by the way, that everyone uses this to one degree or another everywhere, though not very consciously. You can call this common sense, to some degree. The metric though joking, there's no ruler to measure it. But it's the only emotionally correct one, and keeping it in mind you can already wind up measurable metrics, it's such a basis.