Adam's choice yielded six millennial days for humanity to be subject to Satan's influence. The only way to know good and evil is to experience good and evil. Evil has a penalty and is not good.
However, God has the prerogative to impart his Spirit to anyone he chooses. His Spirit is a Spirit of power by which we are able to overcome Satan's influences, the power to resist him. If we resist him he will flee from us.
Satan appeals to the flesh to pursue and enjoy fleshly desires.
Paul explained, "For if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live." (Romans 8:13).
Satan is the ruler of this present evil age, but we don't have to participate with the world and its pleasures.
By faith Moses, when he became of age, refused to be called the son of Pharaoh’s daughter, choosing rather to suffer affliction with the people of God than to enjoy the passing pleasures of sin, esteeming the reproach of Christ greater riches than the treasures in Egypt for he looked to the reward. (Hebrews 11:24-26)