I’m fairly certain Microsoft and Sony both take a 30% cut too.

Yes. They knowingly put things on the platform with the 30% cut in mind because it is worth it to them, ergo they do not find it egregious.

It can be worth it to them and still be egregious. At 50% it’d likely be worth it (to the extent it’s still a viable business) because that’s where the largest market of PC gamers are. It doesn’t necessarily mean anyone would be happy with the fee.