I question what you said on the radio.
First of all, you confuse these two things.
1. the possible world as reality.
2. only an ideal of human beings.
Perhaps there is no life on earth that knows the concept of goodness except human beings, so there is no perfection as the ideal best society over all life.
Secondly, Leibniz's ideal of the perfect world, he believed in God as the designer. Today we can call this a kind of "intelligent design theory".
These delusions came from the fiction known as myth, from the Bible - it was one of the worlds of Hebraism via Christ.
But we call their delusions "just-world fallacy".
So I can say that what you said on the radio is a fallacy, as a kind of new variation of thinking about the hereafter, or just after-the-fact reasoning. Hegel, for example, did the same thing - in his theory of the "Weltgeist".
There is no same ideal goal for our worlds in the other types of consciousness. This is the radical reality.
