What was the reason for the Cretaceous-Tertiary extinction event, or the K-T event, the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago? Was that done by the divine realm to reshape the planetary habitat for eventual occupation by modern humans?

This is another creative insight from putting two and two together and coming up with four, in keeping with our creation scenario for the divine human. You are filling in the blanks to explain why there was not only an extinction event, but a profound reason to have one. This was indeed foreseeing the eventual creation of humanity and was serving to change the nature of life and prepare for a new round of creation, with organisms suitable to provide a habitat of value for human experience. The other element here is that the current human race are all newcomers, not being the first round that was created and put on earth. There are no records of that era that neatly explain its existence and demonstrate what took place, so it is a forgotten part of history, which is only logical because, with extinction of human, there’s no one left to record it. There was a long period in between the first human extinction and the advent of modern human, and that, too, was the need for retooling and a further rearrangement of things to provide other creatures in place to be of value for human survival.