Fight for Survival
What many don‘t remember is that the AppStore made Apple a wealthy company. The iPod made them richt, the AppStore and iPhone/iPad made them filthy rich.
If they loose part of the income from the AppStore then suddenly they will no longer make billions every quarter, and that is for them not acceptable.
I done feel sorry for Epic Games, but for the humble developer, who maybe sell a few thousand apps on the app store for less than 5$ a pop, having the Apple tax being lowered will make a serious change.