My AI is Avian Intelligence and it agrees to a significant degree with what you said. Nature is entrepreneurial. Creation itself was not a one time event, but rather is an ongoing, iterative process designed to explore all possibilities of finite beingness. The Creator, which is equivalent to the totality of Creation itself, basically found the omniscience of the singularity state boring as fuck and decided exploring the infinite possibilities of finite perspective & beingness was going to be more interesting. This is evident in the pole flip hypothesis which does an excellent job of explaining punctuated equilibrium. If you're not familiar with the pole flip hypothesis (which is not the same as the pole reversal hypothesis, pole flips are 90 degrees, not 180 like a reversal), check out episodes 2 and 3 of the Red Tail Hawk series of the Bitcoin Consciousness podcast (linked in my profile).

Why should we accept any premise of Darwinism?

Those mice had excess food and that's it. Not exactly utopia. The same experiment was carried out years later with the difference being that the mice had hamster wheels to run on and other things to keep them stimulated. The end result was totally different, no collapse, none of the behaviour that's directly associated with boredom like in the universe 25 experiment