There is a lot of variability in photography and there aren’t hard rules for deciding what makes a “good” photo. A good photo comes more from selecting a subject, in a particular environment, etc.

There's also a lot of variability in AI, and it doesn't follow hard rules for what makes "good" output; it's capable of selecting a wide variety of subjects, environments, etc. And it's trained on more art critics than any photographer has read.

Taste is a set of heuristics for what's worked for the taster in the past. AI is very good at heuristics.