Lots of discussion on this topic but I have always thought it was a stupid idea. A couple of reasons, firstly, hooking fish would question the ethics of fishing and it would be completely impossible for a pool to be created that gave each and every angler an identical chance of catching.
However, and I expect an MBE for this idea, there is no reason why casting could not be an event.
You also could then split it into several disciplines.
You could have various fly distance events
Lead distance events from say 2oz upto 5oz which would cover the coarse and sea casters.
Accuracy events, akin to archery/shooting, but a target at distance and you need to land a lead in the target.
You could even have a fly casting version of Dressage, where you perform different casts and are marked on accuracy, distance, style and ability.
Actually, lets have our own Casting Olympics!!