Use case for displaying points is that it allows you to get an idea of what percentage of the users on the site agree with the comment. I think that's really valuable. I'm often more interested to know what the masses think because it helps you understand the audience.
Me too, but from years of using this site and similar I find that to be untrue because even assuming everyone votes with this in mind, I don't think you can fully separate perceived value of a comment and agreement with the comment. If you strongly disagree with a comment, then doesn't that imply you don't see value in it? I think that line is ambiguous.