It is not a kid's tale to be thrown out and disregarded. It tells us two basic truths. First of all that God is the Creator. God has made heaven and earth, the universe, and is also the creator of human beings. Secondly, it is telling us that evil comes from human beings exercising the freedom that God has given to us all.
Sin is the downside of the gift of freedom.
Don't blame my family. I had good family, I had a pretty decent start. In this case I chose to go wrong. There are many other cases where the poor unfortunates because of a deprived background had very little chance at all. So, we have today in the gospel, the story of Our Lord himself being tempted.