"Sometimes my doctors tell me that I understand something in a poem that I haven't integrated into my life. In fact, I may be concealing it from myself,while revealing it to the readers." Anne Sexton (1928-1974)
If a person reads something into a poem that I have not intended to convey, who is the wiser? It seems to me more and more that static poetry might as well be prose. Not to say anything is wrong with prose, only that there is a reason for the differing literary art forms.
If twenty people read a poem I have written and and nineteen see and feel something close to what I was saying, then hooray for the one who saw something different. We've evidently had different life experiences. They see something I don't.