Adam and Eve did die. How do we know what would have happened had they not exercised their free will and not given into temptation?
That's the lesson. Resist the temptation to give in to evil.
Then the question becomes, what is evil?
I don't see any evil in becoming self aware and knowledgable.
Maybe that's my problem. I'm on the snake's side. Especially when I see how God sadistically and cruely punishes them afterwards for making their FIRST mistake ever. That's not what I want to see from a good leader, or father, or boss.
But yeah, what is evil, and why is evil there, and why can't God do anything about it? No matter how you twist and turn it around, there is always SOMETHING that God has no power over.