Focusing manga, the shoujo space for instance has a reputation for using out of frame character positionning and not shying away from composing pages with a visual flow that doesn't follow the actual character speech.

It would be complex to pin a given panel order as canonical when the author is playing games with the reader. I don't think authors would oppose an accesibility feature, but I could see the debate if it was a more prominent, sanctionned way of reading.

You've now focused too much on manga/comics. Stepping back a bit and looking at art more in general and using the provided example of looking at a painting, who are you to tell me where I should be looking. yeah yeah, i see the obvious thing your AI is trying to tell me where to look, but I'm looking at this less obvious thing that really strikes my fancy. maybe it's a blemish. maybe it's a unique brush stroke/technique that others might not care about, but an aspiring artist might. (even if it is another stupid AI.)