Thank you for your good question!
This question could be fully answered only in the experience of soul consciousness. Words that you have used such as “likes or dislikes, opinions and choices” are out of that consciousness as we know it now; for our understanding of those words bring ego, which is our current experience.
Therefore, the “reason” why there is so much variety nowadays is because our lives are driven by ego. This, (ego) is the most important single thing to be aware of when studying the self. We need great awareness for that.
In the Golden age, the “status” of the soul is what expresses being “numberwise” and that relates with the capacity of the soul to perform a role. You have the King, Queen, subjects, etc. With ego, we perceive that as “non-democratic state of affairs,” and that is because we do not have consciousness of what a role is and what we truly are (souls.) Over there, the consciousness of being souls exist. In that consciousness there is nothing lacking. Thus, they can go happily on with their roles, just as when in an elementary school there is a play and someone will be the “tree,” another kid will be an “elephant,” and the other kid will be the “prince.” They are aware that it is just a play and they have “fun” in it. 🙂
However, once the consciousness of “I” arrives (middle school) then, there will be fights about who will be the “tree” or the “prince,” because in “our minds,” the role of a prince is more “desirable.” (ego.)