As to whether it would hurt monitisation. I don't think it will and even if it did I don't care they have more money than most countries do. If they must be required to by legal means so be it.
Also they already kinda allow some of this when you enable developer mode via a Mac with the appropriate iOS developer account. So there is no reason why they cannot do this tomorrow without the paywall.
> So there is no reason why they cannot do this tomorrow without the paywall
Sure you don't when you are dismissing economics of software development so vigorously. Try to look at things from the perspective of economic incentives, not pure technical standpoint. You'll understand why free platforms are way less convenient, and closed platforms are as they are.
I got it, and explained how it will hurt monetization of their product. Android is a different story with different (I dare say way more scummy) strategies of monetization.
The point is you can't have a convenient platform which doesn't produce revenue allowing to make it convenient and rewarding the investment.