I broadly agree with your assessment, but I think the important takeaway is that these situations are created artificially, usually by dominant market players for their own benefit. There is nothing natural or neccesary with the way these markets work, and it's certainly not unchangeable.

>but I think the important takeaway is that these situations are created artificially

Are they really though? It's easier than ever for an indie creative to create and distribute their works through the many channels. Problem is, people don't spend as much money as a whole on indie works compared to focus-grouped blockbusters.