Let's just entertain your comment for a bit to see if it makes any sense whatsoever. For small developers, Apple (and most other app stores, except those that charge 30%) charge 15% which includes marketing, distribution, payment processing, and of course you get the software development and the integrated software "kits" the same as apple uses.
Now lets see what you could do wittout the App Store. You could market your software on macrumors, and 9to5Mac and everywhere else that you think you would get exposure, maybe even do an email campaign. That's all free of course, oh wait, you would have to pay for that, never mind. Now you need to hire a payment processing clerk and and after phone, a computer, internet, office space, insurance, benefits, etc. you are well over $100k, so to keep just this expense at 15% you would have to sell over $650k worth of product, which at $10 is 65,000 units. then of course you would need web sites and servers and a place to keep them and electricity - you get the picture - not free.
Now that is not to say that there is not room for improvement, we usually let the market decide. And given that Apple sales are robust, and developers are proliferating - the market has spoken, it basically works. Do we really want big government to come in and tell us how to do things? Not me. Besides, if big government came in and mandated rules, to be legal they would have to apply to everyone. So app stores on Smart TVs, PlayStations, xboxes, kindles (I could download a book on my kindle and pay for it on the App Store?). Maybe Microsoft would even be forced to make Windows ARM available on M1 Macs. Oh boy, this would be so much fun.
Now lets pretend we are a big developer like Spotify. We balk at the 30% fee charged by Apple, but we can download our app for free. Anyone with an existing subscription doesn't pay apple a thing. Anyone who goes to Spotify on the web or an Android, or .... doesn't pay Apple a thing. In fact we lose revenue on all of about 100 subscriptions per year, is that really worth crying over, after all being Spotify, we don't pay the artists very much anyway.
So, the entire point here by the haters is complete BS. Small developers get a market based price for the services they get, and big developers pretty much divert away from the App Store anyway.
And this is not to be construed as a complete endorsement, but let the market decide, or we may not even be allowed to buy store brands in the grocery stores (maybe a stretch, but they are anti-competitive, just like people's claims about app stores.
