Shun wrong metaphors

Even though I prefer clear language with little adornment, no hollow and flashiness and so on, I still can accept metaphors since they are old part of language and gives extra understanding. However, yesterday I saw in newspaper the saying "Tibet, the roof of the world". It is obvious that this is completely wrong and false metaphor because even though Tibet is high area, it is not above all the other countries or covering their skies. So it is wrong.