How do you know that isn’t the case? Perhaps a sense of good and evil is something God instills in each of us, in order for humans to create societies and function together. Maybe there is no good or evil to God?
In Him there is no darkness. (i.e. evil)
Per Jesus :
And, behold, one came and said unto him, Good Master, what good thing shall I do, that I may have eternal life?
17. And he (being Jesus) said unto him, Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments.
It was original sin that allows us to know evil, to sense it, and that unleashed it.
And unleashed, it wreaks havoc on the societies that we try to build. Unleashed, it makes You question the very goodness of the Lord. Unleaashed, it makes You decide that maybe You know a bit more than the Lord about your very existence.