I'm not an artist but I am decent with the pen tool, and for graphic design stuff I typically use AI art to give me a thing I can trace in illustrator with the pen tool, and fix any errors or imperfections I deem worthy of fixing.

I would imagine this kind of tool would allow someone who is not gifted at art (e.g. how do I translate a 2d sprite I made into a forward facing running animation?) the same kind of thing: a pathway to potentially "trace" the generated image, making it better than the original and removing any undesired aspects.