Once a myth is seen to be a myth, it no longer is. That is, if you call a myth a myth it no longer functions as a myth, as a way to make sense of the world that people believe in. The people who believe something is a myth no longer believe in it.
I wonder if a philosophy is similar. Today, pragmatism is characterized by the fact that people don't think of this philosophy as a philosophy. To call yourself pragmatic is, of course, to say that you are not ideological or philosophical.
Once we see pragmatism as every bit as philosophical as the Enlightenment before it, we might begin to find it lessen its hold on our collective consciousness.