A restoration artist would not invent eyebrows because they would have worked under a theory of the sort "human faces are especially sensitized to human interpretation so if the noise image does not strongly support a feature then it is better to leave it vague and noisy than to try and pick one out of a large space of eyebrows belonging to other human faces". This is an entirely reasonable, intuitive theory.

I bet that ChatGPT actually would regurgitate exactly this notion but cannot effectuate it.