I love listening to Milton Friedman talk. I was struck by how verbally acrobatic the challenger was in this video. He was one of the more eloquent speakers I've ever heard. But Milton Friedman in his inelegant speech poked holes in his premises and arguments very easily. As Nietzsche pointed out (and others as well), this shows an example of how it's more important to focus on the point of what we are saying, rather than how good it might sound. That's not to say I don't think precise speech is important or that beautiful speech doesn't have its place. It's just not very good when we forsake a good argument in the process.