> the capital and man-hours of investment necessary to enter a market could be enormous

The point is this isn’t Apple’s fault so they shouldn’t be the ones punished for it. I completely disagree with the idea that if your product gets popular enough by virtue of delivering a superior experience that you then have some kind of obligation to appease the entitlement of users, or to foster growth of competitions, or to be obligated to open up your payment processor gateways to third parties resulting in cuts to your profits.