Microsoft, Sony and Nintendo also take the same 30% as Apple and Google do, and nobody considers that a problem because they believe building the console ecosystem and supporting it (new releases, distribution, security, SDKs, etc) is worth that. Apple and Google have also built the iOS and Android ecosystems.
This isn't really a consumer concern, this is a fight between the platform and the developer about how the money is split, there's no pro or anti consumer side here.
--
In the end, this isn't about Epic vs Apple or Google. It's about Tencent (
who owns 40% of Epic) and their desire to be free of American App Store regulations in China (they own WeChat). Epic is just their weapon in this battle.