Maybe rhyming metre would never be recreated. In some cultures it wasnt. The phase space for what will entertain humans is seemingly almost infinitely detailed, there is no wrong or right way to do it. Eg. people can dance to banging rocks together just as effectively as to Mozart.

On the other hand, there is only one Pythagoras' theorem, and an infinitude of similar incorrect theorems. We postulate that intelligent aliens should discover Pythagoras' theorem but not Jazz or De Stijl.