Advertising peals John de Overa, just because change ringing music is different from classical music doesn't mean it isn't music, or interesting to listen to. There's plenty of other music in the world that is almost as minimalist and opaque as change ringing, and which has enthusiastic followers who listen to extended performances where to a non-connoisseur nothing seems to happen.
It is also normal in non-classical musics for people to drift in and out of the performance listening to the bits they want to and then going off to chat or do something else. Sitting in an auditorium for the duration of the performance is not the only way to enjoy listening.
So yes I think we are missing a trick by not promoting our formal performances as actual performances for people to listen to.