After the novelty wears off and everyone has already seen tons of these automatically generated images, will writers still want to adorn their blogs with these generic illustrations? Or will it turn negative: "If you have nothing to say, add an AI illustration."
I could see it becoming a marker of low-brow taste where vaguely related illustrations become something akin to decorating your home with velvet paintings of Elvis.
Prompt writing is a challenging and creative endeavor like any other, and a well-written prompt/image need not be mearly "vaguely related"; Certainly not in comparison to the stock images that are already utilized today.
I could see it becoming a marker of low-brow taste where vaguely related illustrations become something akin to decorating your home with velvet paintings of Elvis.