In fairness, I'm not sure how hard light constructs of objects would be more effective than simple shields and lasers.
Like if the ring is limited to a certain amount of power regardless of the shape it makes, you might as well use the simple stuff.
IE: Don't bother making a green machine gun when you can just shoot a green laser which is just as good.
Don't make a medieval shield when a wall or bubble is just as strong.
Don't make a green airplane when you can just fly.