This is a very strong misconception of what is 'good'. The human brain actually craves flaws and failures to make something unique and stand out. That is exactly the opposite of most AI generated material so far, as AI boils it down to a common average representation of the same.
One can see the same issue with what happened to instagram and alike. Filters made individuals become more of the same and without distinction, half-life of any of them becomes minimal. Most of them are faster forgotten than it takes to scroll through them.
P.S. it doesnt require Ai to make someone 'prettier', make-up and good photography have done that for centuries
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