If you're going to dismiss the majority of my arguments and points, as well as reality in favor of your own framing, then you're refusing to debate in good faith.
Epic's lawsuit is immaterial, imo. We don't know how the courts will decide. Rather, what's being debated is what a hypothetical open iOS will look like. Even if they lose the lawsuit, Pandora's box has been opened. Years of developer dissatisfaction and corporate strategizing has called Apple's dominance into question, and we are now examining potential futures if Apple opens up. I don't believe a forced opening on Epic's terms is inevitable, nor is it the only model for opening up.
One can even imagine a scenario where Apple opens up on its own terms. Perhaps they provide SDKs that allow the creation of third party app stores with stringent security mechanisms built in, and license that out to partners. They certainly have the resources to undertake such a process, and forcing such stores to pay a license fee would both allow them to recoup on lost revenue and allow them to maintain a level of control over their platform. Epic would scream but again they're neither the first to cry foul over the App Store monopoly, nor the last. If the bulk of the developer grievances can be sidestepped by Apple themselves, Epic would then truly just look like a litigious rent-seeker, rather than a company that's accidentally doing something that's helping the little guy.
> perhaps you can flesh out a realistic hypothetical about what developers can expect
How about the gaming market, especially over the past decade. The rise of Steam, the presence of somewhat niche alternatives like GOG.com, GamersGate, Humble Bundle, (I believe Blizzard was the major publisher with their own digital distribution store early on), then the sudden proliferation of other publishers from EA to UbiSoft and now Epic.
Does it require significant overhead for developers to support multiple stores? I'm sure it isn't free. But is it significantly detrimental to them? I'm not sure. Valve has been criticized over Steam's former near-monopoly of the gaming digital distribution market[0]. At least the present situation gives them alternatives to work with. The AAA publisher stores are often derided, but more from a consumer standpoint than a developer perspective. Having a ton of game installers and store accounts to manage is a pain. It's definitely not frictionless. But again, you're arguing on behalf of developers, and I'm not sure if they're unhappy with having more choices than just Steam.
> There will be exactly the same platform, but a whole load of additional predatory business to deal with.
Again, you have to provide examples in other segments where Facebook, Microsoft, et al have successfully created trouble for developers by offering them (and developers) more choices.
[0] https://www.polygon.com/2017/5/16/15622366/valve-gabe-newell...