I don't see why I should be required to license my IP to anyone, let alone companies that may compete with me. I also don't see how a product I design would need to support a format that is licensed by a competitor and is something I'd have to pay money for.
You want content for your iPod, you can purchase it from iTunes, which will be DRM'ed according to the music industry, or you can purchase your music on a CD and rip it to MP3 and transfer it to your iPod that way.
There is no rule that any company should be required to license their IP, nor is there a rule that a company should be required to purchase a license to someone else's IP.
"There is no rule that any company should be required to license their IP"
...unless you're a monopoly. That's the point of anti-trust laws, that they are special cases. When you're using dominance in one market to maintain dominance in another, they change the rules to stop you, unless you stop yourselves as Apple did.
Apple has a dominance in iOS, since it is their OS, but they don't have a monopoly in the world since only about 30% of mobile devices are iOS devices.
Thus no special case required. When iTunes was around there were other options for purchasing music, hence no monopoly.
You want content for your iPod, you can purchase it from iTunes, which will be DRM'ed according to the music industry, or you can purchase your music on a CD and rip it to MP3 and transfer it to your iPod that way.
There is no rule that any company should be required to license their IP, nor is there a rule that a company should be required to purchase a license to someone else's IP.