Apple's cut is mostly PR and not real income loss for them.
Apparently (NY Times) 98% of App Store developers fit into that under $1 million in revenues group that now pays 15%, but they account for only 5% of Apple's App Store revenues.
Put another way, 95% of Apple's app-store revenues just keep on * as before.
So it's more like stock agencies offering newbies a 50/50 split but switching back to taking 80% (or more) once you get to $500 in earnings.
Apple wants to keep congress out of its business; The Epic lawsuit has also played a part. I hope Apple's thin veneer of reasonableness (the new cut) doesn't dissuade regulators.
However that dust-up plays out, our mess is more akin to Uber or Lyft or another setup where there are no big companies in the contributor/driver community.