But where do you draw the line? If AI imagines 3 people around a business table in front of a flip chart, is that copyright infringement on similar stock photos? Note that in the AI created image, the people are unique, they never existed, the business table is unique, the flip chart is unique, and in general you can't point to any existing photo it was trained over and say "it just copied this item here".
If so, why isn't it also copyright infringement when a human photographer stages another similar shot?