There is an idealism associated with poetry I would not dispel but question. It doesn't change anything except within. It shifts your insides around. Poetry is not going to reach the numbers of people by which we commonly consider a large audience. It just isn't a stadium-filler. It could still galvanize people during a crisis, but let's just say there are two points at which poetry is indispensable to people - at the point of love and the point of death. I'll second that emotion.