It is a numbers game to evolve what you want without interfering with their free-will.

You pour in millions expecting to generate maybe only one or two of the sort of beings you are seeking the company of.

I'm sure he is happy with the ones who came out as he desired without having to make them so and take away their uniqueness and individuality.

The rest are just numbers to him.

He will recycle and do it all over again. Nothing is wasted.