Disagree. Let's just compare music services here.
- Apple Music - comes pre-installed on the phone, icon on the Home Screen, free trial and subscription sign up in app at the push of one button, uses your Apple ID. Apple keeps 100% of the income.
- Spotify - you need to search and download the app, once downloaded you then need to go to a webpage to then register and sign up, enter payment details, log into the app and then you can use it. Spotify could have the subscription in app but 30% of their income would go to Apple, or they charge more to offset the cost but then Apple gets even more and their product is uncompetitive.
It speaks volumes that Spotify occupies the position it does even with all these extra steps. But what it does allow is Apple to hoover up lots of customers because of the ease of access rather than competing on the quality of the product. Simply put it's bad for competition, and everyone gets a worse product as a result.
Also, why exactly don't these restrictions apply to the Mac?