Wisdom isn't a simple matter of been-there-done-that. Wisdom is a matter of God's revelation in the Bible being applied to my life.
The testimony of the LORD is sure, making wise the simple.
I love it that the Bible calls itself the testimony of God. It is the word of God about God given to us by God. It is the revelation of Himself to us. To my knowledge, no other religious text makes such a claim. Yet one more reason the Bible is unique and should be heard.
Some would have you believe that wisdom comes from experience - whether experience in a particular area of expertise or wisdom in surviving a particular experience (such as a surviving a head-on collision). I don't doubt that perspectives shift when those kinds of things happen to us. I don't doubt that some people are wiser plumbers, electricians, engineers, surgeons, leaders or preachers because of experience in a skill.
But the wisdom of the Bible is a wisdom about life. You know people who have been through relationship after relationship, situation after situation and it never seems to get better. Their cycles aren't cycles at all, but rather spirals that go deeper, faster, and more destructive with each iteration. Wisdom doesn't just come to us by living through those things. Wisdom comes from listening to the God of the Universe who speaks through His Word to us and applying that Word as the best way to live.