Eh...I sure am sick of disagreeing with people who should be my allies, but...even allies can have differences.
Sometime I consider the notion that is a ‘design flaw’ but then I refocus on the fundamental Truth. We are all partaking of the fruit of the Tree of the Knowledge of Good and Evil.
If we are unable to understand just what Evil truly is, and what can result from it, the the concept of Good is pretty much meaningless.