That is a great point. Though don't forget that their are many types of ships out there, and we have already discussed the fact that they wouldn't just launch 1 torpedo and get outta there.
Is the Hoot a danger if they launch one torpedo at a ship.....? Not nearly as much as if they launch a few torpedos, a dozen or so missiles, and hundreds of small boats with RPGs and rockets in a mined area. These are the exercises that they are doing, not one launch and gone.
Hopefully this never happens. I hope that there is a peaceful ending to it all. While these toys we talk about are cool, using them in a real situation only results in death and sadness.