Except, they did. Apple started the threats against Epic when Epic started lowering their prices for add-ons on other platforms, which made Apple look greedy. To bolster their anti-competitive case against Apple, Epic turned on the in-app store to which Apple then pulled Fortnite. Epic has to be able to show damages and anti-competitive actions in order to have a case. If they didn't force Apple to pull Fortnite, they wouldn't be able to show damages.