That assumes there is an issue to fix. No one has identified an issue that would cause the gun to fire without actuating the trigger.

There was a recent huge thread on HN around the Air Force incident, we now know the guy was playing with the gun, shot and killed someone, then lied about it going off sitting on the table.

If there was some defect that Sig could fix via recall, they would be stupid not to recall. Maybe there is just nothing to fix, and they aren’t stupid.