A situation caused by the airlines and made worse by the TSA. But, let us look at it.

My case gets sent to the wrong airport. The TSA decides that they have to cut the locks off even though the TSA website says that they won't. So, far we have the TSA destroying private property.
Now the TSO freaks out and says that the gun can no longer fly since the case is no longer locked.
They then decide to give my property over to the police. The government now has possession of my property through no fault of my own. That is generally called theft.
Many police departments have a policy of never returning guns to a citizen. In this case I'm out thousands of dollars. Or maybe New York City will decide that I can only get my gun back if I get a New York City permit without concern that a normal person cannot do that.
So, I have to sue. I'm now out many thousands of dollars for a lawyer and even if I have a court order to return it, the cops still might not.

So, I'm out thousands of dollars, my security is compromised, and all of this just for security theater.

You say that you need to re-screen it because it was in the non-sterile area of the airport. But we know that items go in that cargo hold without being screened. Why destroy my property and cost me thousands of dollars while putting it right next to a USPS package that has never been screened?