Excellent obfuscation and word salad!
Not an obfuscation at all. Evil is simply the absence of goodness, or rather godliness, and I suggest is something subsequent to the real defect. It is not the case that people have to have the option to be evil if they are to be good. We need to back up from that idea, for if we make wisdom and morality, our “goodness”, the thing we have still placed something on the throne of our heart in place of the Lord. That is where the rubber meets the road.
You may have heard claims that Genesis presents Adam and the Woman (he didn’t give her a name till after the fall) as somehow being set up to fall, that they lacked what they needed to resist temptation; however, in part taking a cue from what Christ would later say about how people had to become like little children to enter the Kingdom, I want to suggest that they were well equipped to resist temptation.
What they had going for them is the experience and time with the Lord so that they did not just have to trust Him as small children more or less automatically trust their parents but had time to learn that they can trust Him based on experience, on the relationship. The temptation to become wise was couched in the suggestion that the Father could not be trusted, that He was holding out on them.
The violation of that relationship, that dependence and trust, is what brought a want for holiness and the restoration of the trust and dependency (ultimately and finally in Christ) like children is what restores the relationship and holiness.
Knowing both good and evil is just a symptom of the underlying defect, the lack of holiness and rightly knowing the Father, which is why morality — being moral is both an obligation and itself part of the problem we face ... discriminating against sin (evil) and in favor of the good is what we simply ought to do — is not something worthy of a non-proverbial ticket to heaven. Much more is needed (”unless your righteousness exceeds that of the pharisees you cannot enter the Kingdom” doesn’t mean they were immoral, after all, for they were very, very moral ... and they had Him crucified).