Earlier quoted context omitted.
Yeah, the cut is basically irrelevant. It's the power Apple/Google holds that's a problem.
No, it's highly relevant. Consider Spotify vs Apple music. If Spotify has to charge X + 30% to subscriber's on iPhone in order to make X then they absolutely can't compete on price if Apple simply charges X.
I don't know why I keep expecting users here to understand this. It's not going to happen.