So? That something is predictable does not make it ethically right. That Epic could predict Apple enforcing its monopoly does not make it right for Apple to have a monopoly.
(FWIW I despise many of Epic's decisions, particularly their hostile attitude towards Linux as a platform, so no, I'm not biased towards them.)
Besides that, Epic themselves play Gatekeeper through the Epic Game Store and pay big money to ensure they are the Gatekeeper (excluding retail and other platforms), made on kids by loot boxing them.