Epic has already moved the Overton Window, as 30% is now being considered unfair by more and more people.
These people will then reach out to their representatives for change. Apple will attempt to fight the tide, but it is too late.
Really, Apple is just a monopoly, an illegally bundled system (both with macs and iphones) intending to control the market.
There is no reason why Apple should control the lion's share of profits around mobile apps.
So why did they even pick the fight?
Longread: https://medium.com/gamemakers/the-economy-of-the-metaverse-i...
Just like Apple has not killed most of their desktop offering just because they are not a very significant part of their income.
Also a big chunk of it is probably just Tim Sweeneys personal opinions (he owns over 50% epic by himself so what he says happens pretty much). Basically he is rather strongly (and very openly) against any walled garden platforms.
Is that why he doesn't support the only real open platform on the desktop?