Not an argument, just an explanation.
A lot of people would agree that all humans have value. Certain religious and philosophical traditions assign "worth" to human beings simply because they are human beings. Some of these go so far as to say that we are all gods or part of the Godhead. The Christian tradition (and I think the Jewish would be similar) says that we are all created in the image of God, thus we are to revere that, no matter how cruelly some "image-bearers" behave to others. That's one reason for the injuction against cruel and unusual punishment, the Golden Rule, etc.
But the shrink was really talking about self-esteem, which is a slightly different thing. I believe human beings have value, but that doesn't mean you're the greatest thing since sliced bread. You've gotta earn self-esteem.
Now for my personal point of view.
Bear in mind that being created in God's image isn't a get-out-of-jail-free card. I wouldn't torture a child rapist, but I'd at least want him locked up for the rest of his days.