In that jurisdiction, they call it "exhibiting" the firearm. And finger on/off has NOTHING to do with criminality. You're lecturing about best practices that everyone here understands, while ignoring the fact that even with muzzle down or gun openly carried on a hip, they'd still be exhibiting firearms in response to the trespassers saying they're going to kill them, their dog, and burn down their house.
Taking away their guns wasn't part of an arrest or a red flag proceeding. It was a pandering political response by the DA to the couple standing up to the trespassing mob's threats and already demonstrated willingness to use force as they broke down the gate. The DA's pandering wouldn't have been a BIT different if there had been no finger on that Walther's long-pull DA trigger, or if the (finger OFF the trigger!) AR had had its muzzle pointed at a different angle. The DA would still have called that "exhibiting," because by the BS standards used in the context of all this, it wouldn't have been a bit different. And you know it.
Discussing best practices in muzzle/trigger discipline is a total red herring.
