Fly casting differs from spin casing in a few key ways, and here’s one one of them: You need both a forehand and a backhand cast to achieve effective presentations. Trying to fit a forehand cast on the backhand side is a bad habit that causes problems and limits what is possible on the water. While there’s plenty of room for personal style in fly fishing, this is not one of those places.
As you can see in the video, there are multiple reasons for developing both the forehand and backhand casting stroke. Being equally comfortable with both sides opens the doors to every angle necessary on the river . . .