Mindless rambling from poem?
Absolutely. And anyone well versed in the language of the poem should be able to distinguish between the two as well.Mindless rambling from poem?
What exactly is your dissatisfaction with poetry?
How do we distinguish useful information from information that is not useless? Obviously no one can set down hard and fast rules for what is, and what is not, poetry; yet you seem to want to force us into giving you a clear definition of what is poetry and what is "mindless rambling". collinsmark has given you an admirable outline of what poetry is. Of course much can be said on this topic, and if you are really interested in this you will go down to the library and read a book on poetry; there are many such books.
The poet is an artist with words who tries to present his unique view of his subject matter (most people do not have unique views and they do not become poets), using language in a high, beautiful and very skillful manner. Of course this definition is too short and too simplistic but is a useful starting point.