Reddit karma is (mostly) useless, but I think the poster's point is that they are meaningful to a great number of people, otherwise they wouldn't be accumulated and fought over with such zeal.
People's egos are tremendously important to them, and the people around them.
Again, the point is that these things that people fight over have meaning, even if they can't really be used for anything.
The crusades arguably were fought over things that had a lot of meaning, even if they didn't have a lot of utility. It'd be hard to argue that the crusades had no meaning.
Reddit karma is (mostly) useless, but I think the poster's point is that they are meaningful to a great number of people, otherwise they wouldn't be accumulated and fought over with such zeal.
People's egos are tremendously important to them, and the people around them.