I don't get what's the disagreement here. Apple sells you a whole system, iPhone + iOS. They don't sell you two things, like in PC world, for example, and that's different and that's okay as long as everyone is upfront about it.
What I am saying is that Apple sells you a product. You own it. You can do whatever you want with it. Feel free to alter any part of it, just don't expect it to work or keep your warrantee. The fact the product has limitations out of the box is a different matter. (Kind of like no one complains that kitchen timer can't boil water, or doesn't have nanoseconds precision — you want those things, you buy a different thing or make your own.)
What Apple doesn't do is to restrict you in how you use their product. There's no such thing like "you can only non-commercially photograph your family" or "never resell your iPhone", or "detaching screen is illegal".
And, more importantly, there is nothing Apple can do to stop you from doing any of those things.
