You make it sound as if even if not intentional, misunderstanding someones point in this way is as a result of negligence ("vice").

If you express yourself in metaphor, it is reasonable for someone to ask you to expand upon or specify your views, so they can build a more accurate model of what you're trying to express. This could be because of simply not understanding fully what's being said, or being unwilling to assume that what they mean is what you think they mean.