Why? You can buy an Android, or one of its derivatives, or a Huawei.
Any software maker is free to sell on any non-Apple device without Apple saying a word.
But what about the other way around; how does Apple ensure that third-parties can compete with their private entitlements?
Is it even realistic for an indie business to compete against any of Apple's provided services if they're forced to serve that business through the App Store? Apple's progressive pricing scheme seems to punish them for posing a threat to any first-party services.
I wouldn't take HN's cognitive dissonance personally. Half this website has to fellate their favorite CEO on a daily basis or they dematerialize into insecurity.