Apple have managed to get themselves into a monopolistic position. Actually it's a duopoly. It doesn't matter if there are alternatives to Android and iPhone, those are the majority of devices to something like 99%. If you want to access that marketplace you need to go through one of those 2 gatekeepers and they have similar rules. This is the exact kind of situation that monopoly laws are there to address. Apple have been hugely successful. No-one is proposing to take the success away from them, but they are taking away some of apple and Google's ability to control the market they've captured.