“Should she be told to just point in the general direction of the bad guy and empty the magazine?”
No. Try it sometime at a range. You won’t hit anything. She won’t either.
Have you considered suggesting she dry practice? Cheaper and you can develop your skill a LOT that way.
No, you are right, she won’t hit anything. Better advice might be for her to fire one shot in the general direction (to see if that will scare him off), then hold her fire until he gets close enough for her to have a good chance of hitting him.