It's an option to those that do not wish to see batton twirling and napkin folding, although obviously they are not happening at the same time.
Many concurrent activities going on at all times. Just choose what suits you, and don't worry what suits others.
As to why Carnival would hire (not sure why you are namecalling), apparently there is an audience. If there weren't, guess what?
You already answered your own question. On both boards