Hello, Julia.
I never paid much thought to the Prince’s being named Prospero. Now that you mention it the lavishness of his party does prove that he has little concern about the people outside of his residence. This oddly reminds me of how celebrities are currently talking about cures and test kits for coronavirus and how they can afford testing when it is something the average person cannot afford. As far as the Journal of a Plague Year goes, I think the numbers show that catastrophe was more prominent in specific areas, which led to the masses fearing that if it can happen to one person it can happen to anyone. I do find the idea of using the supernatural to explain such phenomena quite interesting as mimicking the plague does not change its severity.