Another of the mysteries but there we are creatures of free will that includes ability to make choices. We are not marionettes manipulated by invisible strings. The ability to make choices includes ability to choose wisely. Or choose wrongly. Without such choices there is no ability to experience the full range of human emotions--love, joy, anticipation, hope, great expectation, satisfaction in goals accomplished, etc. While it is obvious that other creatures also experience some degree of some of the emotions we experience, none are fully capable of making choicess beyond their immediate experience our outside their experience.
We are not only apparently the only species with a full range of emotions, but we are also the only species capable of making choices about something we have not experienced. We are the only species capable of caring about or knowing about anything beyond our immediate experience. And the capability to love God, which is the most incredible and joyous experience of humankind, must of itself include the ability to reject that love, even to hate God. There is no up without a down, no in without an out, no there without a here, etc.
I doubt the ancients knew or considered all this in their day, but they had the intellect to know that humans were somehow capable of having dominion over all other creatures As is reflected in the Biblical allegory.
But the ability to distinguish good and evil of itself includes the ability to choose bad or wrong or evil as well. And when we choose not to love God enough to yield to his guidance, we won't choose as well. And little by little we thereby choose to screw up the perfect creation we were given.
Perhaps it is the incredible and unfathomable marvel that is the human brain and the human capacity to love, hate, choose, adapt, that gives extra credence to the concept of some kind of intelligent design working in the universe.
Still doesn't seem perfect to me. A perfect creation to me would only be choosing between a collection of good choices, not choosing good or evil.
How can there be a 'good' without a 'bad"? How can there be virtue without evil? All I know is that love cannot be ordered, but without it, there is little in life that makes any sense at all. And perhaps, metaphorically, before Adam and Eve chose to be God instead of loving/obeying God, there were no bad choices? And once they made that choice, they began the process of spoiling the perfect creation?
If there was no ability to choose wrongly, then we are nothing more than puppets with every thought, action, and emotion pre-ordained. As I know that is not the case, then I have to accept that the choices I make do make a difference in the immediate, or at least the future of us all.
To me not being able to choose wrongly would be perfection. We're a far, VERY far from perfect species. We could have perfect conditions around us. Perfect weather, no diseases, perfect resources, and we'd still be trying to conquer each other, we'd still be at war, etc etc.