My theory about metaphors describing the world?

I think metaphors are for people who want to sound vague but insightful at the same time. A great deal of their success is in sounding poetic but being entirely open to interpretation at the same time. I can construe anything I want - anything Im already inclined to see - from your metaphor. And if I like the poetry of it, Im inclined to adopt it as my own and use it as rhetorical ammunition. Metaphors sound refined and educated, its putting your thoughts into words... but what those thoughts and words actually are is relative and arbitrary. The power of speaking to other peoples delight without actually saying anything. Metaphor is used when rational, logical and legitimate reasoning fails; and is used to sound more insightful and "deep" than someone actually is. Id rather have a weak but precise (logical) argument supporting my claim than colorful blotches on a canvas - if you get my meaning?!?!