The logic lies in that as human civilization formally entered the dawn of the star colonization era, for the sake of maximum expansion, population would become the scarcest resource and wealth. To the decision-makers, it was better to utilize it for migrating to extraterrestrial planets to break new ground rather than wasting it in wars.
Inheriting and passing down human civilization on a planet clearly wasn't enough with just robots. Only with sufficient population support could the diverse cultures and traditions of Earth continue to flourish.
All the above conclusions were drawn by Qiao Ze during his idle time studying world history.
As for whether they were correct, he had not thought about it, because he had never discussed these with others.
It was simply about giving a sense of purpose to his goals as a human being.
It's what is commonly referred to as "theory guiding practice."
