The "garden event" I think is quite clearly symbolic, especially because the names themselves are symbolic terms. The importance of this narrative is not "did this happen?" but what is really being taught here, particularly in terms of morals and values.
Today, it makes not one iota of difference whether Adam and Eve were real characters, but what does make a difference are the morals and values that are found within that we can refer to today.
All right, I'll bite.
What is being taught in terms of morals and values.
The story says that God planted a tree with absolutely no other function than temptation. In the garden there was a snake that was cunning and evil. The tree would give them insight into right and wrong, which they then did not have when they should have understood that it would be wrong to eat the fruit. Eve and Adam ate the fruit.
Then God punished them. He tossed them out of the garden, he damned the earth to make food more difficult to get, he damned the woman to have pain during child birth, he made them mortal, he damned them so harshly that they never got pardoned or had a chance to serve their sentence and move on.
Then God decided that their children would be equally damned. And their children! And their children! All the way to you and me, and we are still suffering the hateful punishment of a psychopathic God, for something that we didn't even do, but our first ancestors did in a moment of curiosity.
So please tell me, what is the moral values we should learn from this? That we shouldn't seek knowledge? That we shouldn't explore and think for ourselves but bow down as slaves to whoever rules the garden? That it's okay with unlimited punishment for a limited crime? That it's okay to punish someone for something their ancestors did but they didn't do themselves? That it's morally just to entrap people with tempting fruits and then unleash horrible punishment when they walk into the trap?
I'm really struggling to see what positive moral values we might learn from this story.