"Joint Special Operations Command, or JSOC, reported to the White House that the "double-tap," or follow-on strike, was intended to sink the boat and remove a possible hazard to other ships, and not to kill survivors, and a similar explanation was given to lawmakers in closed-door briefings."
If the Commander's intent was to "destroy" the target, this makes sense. This term has a very specific meaning, implying that the target is rendered in such a way that it would be impossible to reconstitute it. Even sinking a ship doesn't destroy it, as it could be refloated and put back into service.
In Afghanistan and Syria, there were times when bombs were dropped on a target because there was a little bit of wall left after a previous strike. So doctrinally, it had not been destroyed.
Right now, Russia cant invade anyone. They have their hands full with Ukraine, a very small nation compared to any other NATO member.