This analogy makes no sense because you are not prevented in any way from purchasing the many other devices that provide almost identical functionality. It's like complaining that Walmart hiked their prices but ignoring the fact that the mom and pop stores still exist, at a higher number compared to walmarts, and are selling the same products for cheaper. You have incredible consumer choice for phones, you can't chose to purchase a luxury phone and then complain about it.
It has absolutely zero to do with your choice to purchase a different device. It has everything to do with hundreds of thousands of companies' right to do business with customers without Apple in the middle.
What right does a company have to piggyback off of another company?
Like think about this logically? Should a grocery store be forced to sell my products without receiving any of the profit? Can I force a cafe to let me serve customers on their premises without giving anything in return?
They explicitly prevent other companies from providing this infrastructure, marketplace and platform. Apple don't offer this stuff as a favour to developers, they demand that developers use it and prevent them from using anything else. Apple aren't some Good Samaritan providing a centralised set of services out of the goodness of their hearts, they are forcing companies to pay an exorbitant fee to be able to play in their garden, and they make billions of dollars in profit from this.
Compare Apple with Steam (who also provide the infrastructure, marketplace and platform). Steam don't force developers to use their services. They're still successful, but you can get almost every game on Steam from somewhere else. This is what I'd ideally like Apple to do. It wouldn't make any difference to me, as I haven't owned or developed for Apple devices in many decades, but it would make a huge difference to many developers, and many device owners. I doubt it will actually make that much difference to Apple's profits, but it would make a difference to the rapidly declining good will they have in the developer community, and increasingly in their customers.
The mom and pop stores in this analogy are the multitude of devices which are not produced by Apple and provide the same features, like Android phones and phones which are trivial to flash your own custom OS and software on. So no, your analogy does not support your conclusions.
And one gives you the control you want over your device ie. sideloading and alternative app stores right? So why not simply purchase devices that use that operating system?
