As the author, do you just don't see what ridiculous image the slop machine spewed out - a kind of visual dyslexia where you do not register problematic hallucinations?
I can go on for a while hypothesizing, and none of the reasons I can come up with warrant using obviously bad AI slop images.
Is it disdain for your users - they won't see it/they won't care/they don't deserve something put together with care? Is it a lack of self-respect? Do people just genuinely not care and think that an article must have visuals to support it, no matter how crappy?
The mind truly boggles.