A healthy artistic scene, whether the medium is music, film, visual arts, literature or games needs many competing schools of criticism, all championing different aesthetics. If any one school gets so dominant that they can make their aesthetic the default and set themselves up as gatekeepers, it’s bad for the health of the medium as a whole. It gets worse if that dominance becomes entrenched.

This has happened in the world of literature, where the “serious novel” needs to conform to such a narrow palette of tropes that it’s become a thing of parody. Rock and pop criticism has run into the same problems many times in the past.

What can or should be done about it is another question.