The most important thing to keep in mind, when considering AI images for helping to illustrate or explain the actual content, is that AI-generated images have a big trust problem.
Take a look at the Google Image Search results for 'Engine Diagram' https://www.google.com/search?q=Engine+Diagram&tbm=isch
In the first row I get two correct-looking diagrams, then a load of AI-generated ones. Three cylinder heads for four cylinders? Two crankshafts? Oil pan labelled Crankshaft? Oil pan labelled Connect in rod? A four-cylinder engine with seven valve springs? Parts labelled up to 39 but a 9-item key? Spark plug wires that loop back on themselves? A crank shaft where the pistons aren't offset in phase? Four-cylinder engines whose exhaust manifolds have three or five openings? Then in the second row, I get "Parts of a V6 engine" showing a four-cylinder engine - with an 'Exhaust malvol', an 'extaust manivol', an 'exsoust manivol' an 'oilolaivt manivol'
Savvy technical audiences have noticed this - and so when a diagram has a whiff of AI about it, they become extremely skeptical and distracted.
Personally I only use AI-generated diagrams very sparingly, and very carefully.
Diagram-wise I had better luck in telling it to make a text version for diagram generator, not only AI edits tend to be more correct, it's easier to fix any errors too.
As a bonus you can then prompt AI to validate whether the diagram matches article and vice versa, I've caught some small bugs like that when we migrated our docs
To be fair, the problems you describe existed before AI, though I concede it has gotten worse.
What baffles me is why anyone would think it a good idea to post and host these images? What’s that upside?