Because that makes no sense and there isn’t anything to penalize. If they spent lots of time studying that’s their choice. If they signed up for an easy class

Because that makes no sense and there isn’t anything to penalize. If they spent lots of time studying that’s their choice. If they signed up for an easy class, that’s their choice. If they score well as a result of hard effort, awesome. When I teach and see a student who is breezing by I might ask them why they didn’t take something harder, but I’d never punish them. That’s an absolutely dreadful and terrible idea.