Nope. You can feed AI on a hand-picked database of the best of the best of generated images. I'll give an example: generate one hundred thousand images of hands, have one hundred people sort through all of these photos, doing one hundred images a day. Delete any hands that are outright anatomically incorrect. Then, feed this back into the AI until it learns to generate better hands. Repeat this process for anything.

In fact, this is already happening with Midjourney. They track which photos their users select, then they feed those photos right back into the model. Coincidentally, Midjourney v4 is currently regarded as the best image generation model available at the moment. It's considered to be far ahead of the competition at the moment. No points for guessing why.