How many callers believe that one role does the majority of the work in a courtesy turn or a butterfly whirl? If so, can you explain how the shared weight that differs from an allemande?

I've always been taught about shared weight being essential in all contra moves, and I guess I'm still surprised when I hear callers prompt "pick her up and take her to the other side" as if the person in lady/raven role is not giving any weight. (Or similar one-role-biased prompting.)

Thanks,

Ron Blechner