I think using translation software or AI images comes down to the ease of working with the system vrs a human. For example, I've created placeholder images for various pieces of work. The images didn't bring in any revenue; they were throwaway pieces, so I didn't give a shit. It wasn't worth paying a human for it.
Before I had AI-generated images, I either left out images from the work or used no-copyright clip art because, again, it wasn't worth arguing with or paying a human to do it.
When it came to diagrams, before Excalidraw, I would dust off my drafting skills, draw something on paper with colored pencils, take a picture of it, and use the picture as the diagram. In this case, I was willing to argue with and pay myself.
Before I had AI-generated images, I either left out images from the work or used no-copyright clip art because, again, it wasn't worth arguing with or paying a human to do it.
When it came to diagrams, before Excalidraw, I would dust off my drafting skills, draw something on paper with colored pencils, take a picture of it, and use the picture as the diagram. In this case, I was willing to argue with and pay myself.