I do see how it does, in a way. That something the designer thought is "invalid state" turns out a valid and possible state in real world. In terms or UI/UX, it's the uncomfortable long pause before something happens and screen renders (lack of feedback, feeling that system hangs). Or, content flicker when window is resized or dragged. Just because somebody thought "oh, this clearly is invalid state and can be ignored".

The real world and user experience requirements have a way of intruding on these underspecified models of how the world "should" be.