Fascists have always hated art and artists. Art is open to interpretation; fascists can't tolerate ambiguity. Art invites uncomfortable questions; fascists demand easy answers that justify their worst impulses. Art captures the messy and complicated nature of life; fascists insist on a black-and-white world where they're ontologically good and their enemies are ontologically evil. Art involves the artist baring their soul to the world; fascists view vulnerability as a cardinal sin.
To the fascist, the dull and shallow nature of AI art isn't a bug, but a feature. Image generators produce exactly what is demanded of them without any deeper meaning or nuance, which is what fascism demands of art and artists to the extent that it permits them to exist at all. If you look at the actual art fascists have produced - from the sentimental pablum of the Third Reich to modern trash like Pureflix films - it's eerily similar to the dead-eyed, lifeless nature of AI content.