Beckett's Wagner putdown

The unnecessary and arbitrary nature of this putdown rouses me rambling but irate from a years blogging sabbatical. Why does Beckett think that his two cents count after invoking Rick W? It's not a put down; it just shows a lack of fantasy:


I cannot explain very well to myself what they have that distinguishes them from the rest, something arborescent or of the sky, not Wagner, not clouds on wheels; written above an abscess and not out of a cavity, a statement and not a description of heat in the spirit to compensate for pus in the spirit. -----Beckett, trying to explain some of his better scribbling, 1932