You are making a distinction that does not exist, between “generated” and “contributed”. Creating art is a multi-stage process. These stages are generative in nature. If an AI does one of these stages, the result is (partially) AI-generated. That’s the meaning of “even if you hand-edited it”.
Use an AI to create the sketch, hand-edit it? AI generated. Draw the sketch yourself, have the AI turn it into a full painting? AI generated. AI created a 3D model of a brick, I used it to build a 3D house? AI generated. AI came up with the character design, I redrew it from scratch, but it’s clearly the same character, in a “if the sketch came from a human, I could be accused of plagiarizing their design” sense? Also AI generated. AI drew the background, I drew the characters? AI generated. AI drew the characters, I drew the background? The final artwork is a composite of several smaller works, and it counts as AI generated if any of these smaller works are the output of generative AI. That’s what I mean by “contributed”, not any vague “the robo taxi took me to the art supply store, therefore it contributed” sense.
Inspiration obviously does not count. The distinction is also quite clear. If the inspiration came from a human, would i need to credit them? Could they sue me? Would my work count as a derivative work? Only if I go beyond mere inspiration to outright copyright violation and/or plagiarism. Inspiration is not contribution.