Fundamentally, scale does matter.

If you have a small pub in the middle of nowhere you can be a selective as you want. If your pub chain feeds 50% of the people in the country you damn right will have to be heavily restricted in what you can do.

It doesn't matter if it's monopoly or not. After you cross a threshold the rules should be different and it's just amazing Apple has been allowed to grow so big with basically no oversight.