Wow, what a lot of discussion about dancing on this cruise forum!
I am also a serious recreational dancer--in fact, I have formally taken eight different kinds of dance lessons throughout my life, including ballroom. The others are ballet (my second favorite), tap, modern jazz, flamenco (my favorite), hula (Hawaii), belly dancing, and Bollywood (India). I certainly agree that experienced ballroom dancers can intimidate newbies, due to the exacting moves and intricacies of certain steps, and the fact that good dancers have a flair and a style that could appear like one is showing off a bit.
I also think that Cunard should not just have ballroom dancing--they should encourage more diverse types of dancing as well, because dance can represent culture, opportunities for free dancing allow everyone to join in and do their own thing, and access to formal ballroom lessons is very limited in many parts of the world. Additionally many young people think that ballroom represents an older generation. I, personally, would never want to go on a cruise and just do ballroom dancing, unless the cruise specifically stated that this is a ballroom dance only cruise.
Throughout the decades many different types of dance have sprung up -- rock dances like the twist, couples dances in disco, the fun moves of hip hop, and now modern Tik-Tok dances, all of which should be recognized to have as much equal value as ballroom, because they are all enjoyable to watch and do!!
Yes, ballroom should always have an important place, but it cannot monopolize the dance floor. Cunard probably thinks about this as they consider growing the customer base. Hopefully there can be some kind of compromise, so all feel welcome and all can participate in the joy of dance!