The recreation of Neanderthals would be mainly a question of societal risk avoidance.

Faith is a very powerful force in the history of humanity. So I greatly respect different kinds of faith. Just as I think diversity is a really good thing genetically, it's also a good thing societally.

The main goal is to increase diversity. The one thing that is bad for society is low diversity. This is true for culture or evolution, for species and also for whole societies. If you become a monoculture, you are at great risk of perishing.

A poet sees a flower and can go on and on about how beautiful the colors are. But what the poet doesn't see is the xylem and the phloem and the pollen and the thousands of generations of breeding and the billions of years before that. All of that is only available to the scientists.