Agree. A better response to '80% chance that this is a known shoplifter' is for security to keep an eye on them. It should very quickly become apparent that it's a false positive (or not).
The (psychologically) correct way to think of this is as a colleague making a claim and telling you how certain they are. But this tech is not sold as a colleague, it's sold as a machine that is better than humans. It's not a perfect super cop but that's how it is marketed and why people buy it.