It feels to me that you like finding "injustice" in things and then pushing hard to "make things right"
I don't want to take that personal drive away from you but it isn't great when trying to be open to all sides of a topic. I will attempt though.
Sure, there are always fringe cases. Those cases where Apple made the wrong call and a developer gets screwed. However, it is not a large percentage of the apps in the App Store. It is a small percentage.
Also, remember these changes are not happening because the independent small developers care. This is happening because of large businesses wanting more profit (which I am not judging as bad).
So unless a very massive organization, that would bring in tens or hundreds of millions of dollars for Apple goes to another App Store, I don't think that Apple is going to pursue them to come back. Also, if that happens, chances are good they still won't pursue them because it wouldn't make financial sense for either party.
Finally, let me address the "Apple has no business taking a cut" comment. I am not sure how many businesses you have run, where your decisions affect the paychecks of your employees and if they can pay their bills and put food on their tables. I have been in that position several times (currently I am) and I make decisions that allow my business to make money. I don't turn down revenue streams because consumers don't want to pay money. I think most business operate with a general set of business principles, so you are totally allowed to have that opinion. However, I don't think it really will ever happen as long as capitalism is the basis for our business principles. I think your energy might be better focused on that effort.