>Even a terrible MS Paint drawing is more interesting than an AI-generated image
True and factual. I don't get why people don't just take pictures from Flickr, CC BY-SA, just post it and link the author. Having an AI-generated image in your writing makes me think the whole text is also AI-generated.
By the way, the best thing you can do for skimmers is include images, because they break the flow of text. You can also try using headings that stand out for having inverted colors for example, but people generally don't do that with markdown and generic heading CSS.