Oh, it isn't. But Apple did just get smacked down hard in Europe, and Europe isn't done with them yet because they're playing games instead of actually opening up the iDevices.
I still can't understand what was wrong with the idiot judge in the US who let Apple win a suit that they should have lost. But Apple's days of customer abuse are numbered. Oregon just banned parts pairing, the FTC is going after Apple's monopoly.
Basically, Google sells (or really, licenses) a component that goes into a phone.
Apple sells a phone.
That's a huge difference.
It's like saying Google sells you the engine to a car. You as an auto manufacturer can put that engine in your car.
You cannot, however, put an Apple engine in your car, as Apple doesn't sell engines. They only sell cars.
All the EU has done is said that Apple can't dictate that you only use Apple tires on that car. All Apple has done is made it so that alternative tires have to meet certain requirements.
(This is actually happening in real life - Tesla tires aren't actually available outside of Tesla - even though they're made by third party companies, the tires with those exact specifications are not available from those third parties. You can however get similar tires that will fit and perform similarly, though, but they aren't the exact replacement. For most people, you won't notice a difference, other than a slight loss in range).
Google interfered with third parties - it's like saying just because you use a Google engine, you can't have seats from some company - sure Google will provide you free seats with the engine, but you cannot offer alternative seats as well.
None of it applies to Apple, because Apple makes the phone. It's like asking to buy a Tesla with a Hemi engine from the factory.
As much as Samsung would love to license iOS from Apple, there is no law nor lawsuit stating that Apple must license their operating system to anyone else who asks. And honestly, that would be pretty troubling for everyone involved if some third party could demand licensing. Like Microsoft could demand Linux be licensed under BSD, for example.
In the end, it boils down to Android being an OS that Google provides to phone manufacturers to put on phones. Like Microsoft providing MS-DOS and Windows to be put on computers made by other companies.
iOS is an OS that comes with Apple phones and restricted to Apple devices. Just like how the UNIX wars were fought the same way - if you needed Solaris, you had to buy from Sun, if you needed IRIX, you bought from SGI, and HP-UX from HP.
Of course, usually the open system kills the proprietary one - I mean, Linux came about and wiped all those companies off the map. Android wiped out a whole pile of iOS marketshare, but Apple is still around - they found a niche and stuck with it.