Just stirring the pot a little....

Who cares if there's no direct application for the cast itself? It becomes an exercise in coordination then, like all ball-handling tricks basketball players have been doing since the Harlem Globetrotters started touring. It's just fun to do.

Personally, I think at some point every one of these might have some applicable situation and the indirect results of becoming that comfortable with your equipment have other impacts to your "applied" fly-fishing.