I think I now understand how the term Diva came to pass.
Yes “Diva” can include a multitude of occupations. A plumber can be a diva, a nurse, a rock climber. But I now have a deep knowledge of how the mind of a diva is formed in musical theatre, and that nothing like that could ever happen in theatre.
(When I say “theatre” I mean non-musical plays.)
We did a sitzprobe yesterday. I had never heard the word till a week ago, learning that I would be involved in one. I went out bought a rifle, ten gallons of water, and as much canned food as I could carry… discovered it was “where we sing with the orchestra” and returned all that I had purchased (save for the water—that’s still useful).