People can make use of anadiplosis in speeches as a means to hammer their points home. I once heard a fellow student at my university give a speech on how something needed to be done about the rising student population and the parking problem that it was creating, and he used anadiplosis effectively.
He wrapped up his speech by stating, “Excessive recruiting leads to a congested student population. A congested student population leads to congested parking.”
He was frustrated that campus authorities couldn't seem to see the relation between all the efforts being made to get more students to come there and the increasing lack of parking spaces. He wanted them to either stop recruiting so many or build a parking garage.