It seems Midjourney is great at generating non-pornographic pictures.

Uhh... Spanking isn't inherently pornographic - that particular image was supposed to be a Gary Larson parody style comic.

Here have another prompt: "Rapunzel has let her hair all the way down a tower. The hero has been tied up by the witch, and annoyed at Rapunzel's continual attempts to escape, the witch throws the bottom of her hair into a paper shredder at the base of the tower."

You could v-roll until the heat death of the universe without even getting close.

Midjourney is great if all you're capable of conceiving is 90s Mad Magazine templatized mad Libs, banal crap like "Darth Vader as a French pantomime street artist".

Unfortunately that also describes the majority of midjourney users.

Yeah, prompts which basically just list properties (Darth Vader, French, pantomime, street artist) seem to work well, but relations are mostly too hard for these models. Even "a monk playing chess against a clown" or "a blue book on top of a yellow book" is out of reach for Bing's Dall-E ~3, and Midjourney probably isn't much better here.

https://www.bing.com/images/create/a-monk-playing-chess-agai...

https://www.bing.com/images/create/a-blue-book-on-top-of-a-y...

Simple (prompt only) use of generative models is quite good at creating simple artistic pictures you might actually hang on a wall. Trying to create a complex scene with just a prompt seems still a few years off though.