Well, a false positive rate of 54% essentially means it is in fact just coin flipping.

For any other product on the market, a failure rate of 54% would be cause for a complete recall if not a wholesale scrapping of the product but apparently does not apply in this case.

You need to know the false negative rate to evaluate it against a coin flip. For example, a hypothetical machine with a 50% false positive rate but 0% false negative rate could still be really useful, if the machine itself is cheap/fast and the subsequent screening slower/more expensive. With such a machine, you know that the 50% who pass are clean, thus reducing your followup screening load by half.

Of course, a machine with ~50% false positive and negative rates is indistinguishable from flipping a coin.