The right analogy here is that you make 50% of the beds in the world and you are preventing anyone from buying sheets except from your own official supply.
When someone wants to read a book in a bed you manufactured, you charge the author 30%. When someone wants to watch a TV show in a bed you manufactured, you take a cut of the subscription revenue and force them to use your accounts and billing system.
When someone wants to have sex in a bed you manufactured, you have to vet them first and you only let them deploy on Tuesdays. And if they don't know the latest moves, they're out. Also they have to wear your condoms, meet people through your dating app, and pretty much obey your rules or they're banned from your beds.
And the other bed manufacturer? You get kickbacks from them. It's just the two of you, controlling all the beds in the world.
The problem is the bed shouldn't really be yours anymore. And you've extended your reach way beyond the original moment of sale into literally every activity the purchaser performs.
Why does Apple get to control what dating apps I use? Why do they get a cut of Kickstarter revenue? Why can't I write software the way I want and give it away to others? It's just silicon, after all. Whatever happened to open computing and monopoly busting? Apple's vice grip just keeps getting tighter as they ensnare more and more of the world.