I saw this article about the TSA finding guns and note their comment:

“the throughput is slowed down and a passenger that likely had no ill intent ends up with a citation or in some cases is even arrested.

The interesting omission was “terrorist”. Those in “security” aren’t looking for the “bad-guys”. These weapons don’t do anything on their own. A person has to use the tool, and the TSA is not looking for the person.