Also remember how long that Microsoft rulling took and what it actualy ended-up being in the end - which for most was an annoying popup for those who already knew how to change web browsers. These days what happens is EU will start the long process and before it hits court some agreement is made.
But the difference for Android and Apple is that Android is `open source`, IOS is not.
Buy an android phone and change the app store - kinda entails rooting the phone in most if not all cases in some way and that for most phone sellers does void the warranty.
So say Apple did offer you to change app store - but in doing that voided your warranty, which would be fair from their perspective. May even be case of, well you have non Apple app store - no Apple services for you as we do not trust your device as you have modified it - enjoy. Again, something that they could justify and in a way which would be fair from their perspective. After all, nobody wants to open up a system in a way that may expose it to outside security or stability issues now. Remember Apple is more about reputation than the products, though they do go hand in hand, it is the reputation that carries them as much if not more than any individual product.
Another way to view this is a hotel has a nice inhouse restaurant, should they be forced to allow McDonalds to open a store in their hotel or leave that choice to the guests who can go to another hotel if they want that experience.
So if anything we get the term of mis-buying as nothing was mis-sold with such expectations the customer later acquired after the sale.
FTFY ;)