Interesting thoughts, really.
But maybe change contexts—would you call Coca Cola a monopoly? Certainly Pepsi gives them a good run for their money, even if they aren't as large technically speaking (I have no idea).
I mean, people will always have their preferences. I'm not sure if that makes for a monopoly on its own.
How much that preference is formed by the company's inherent pursuit of a monopoly, well...
I'm not sure if it's that different from other contexts, or if it is.