I don't trust Apple to make the right decisions. Censorship should be an obvious reason which they have proven to censor apps due to pressure. I wouldn't give the government control to decide what can be sold and what can't why would I trust Apple to do it?
It seems there are a lot of people that think people shouldn't be allowed to make money without Apple getting a cut when in fact the App store is what drives the hardware sells of their phone to begin with. They are getting a cut. I guess everyone here that supports Apple in this would also agree that the ISPs should be allowed to restrict amazon.com and other websites as well and demand 30% of their sells since amazon is getting to make billions of dollars of their backbone network?
You see a problem with Windows, OS X and Android however I don't. I've been using Windows since 3.1 and the openness of the system has been it's greatest attribute. It allows anyone to just start developing apps and getting them to potential customers without having to go have a middle man and that is how it should be. If an app is bad then it won't be successful. If an app is good then it will be and more and more people will find out about it.
No App on any platform should be allowed to connect to a cell network without being vetted. It would be quite easy for a terrorist to write an App that starts dialing 911 every three seconds when a terror strike happens to clog the phone systems. It would also be easy to write an App that makes calls to a 1-900 number at random times to pad someones bank account. That said, even a badly written application can degrade performance for the entire phone. You might run a game in the morning, then that night, have a crash in a weather App. You would think the weather application was the flaw but it was the game.
I will not develop for an open platform because I do not want to take the blame when some moron programmers memory leak kills my App.
Apple has an obligation to it's users to provide any limitations it thinks will improve the quality of it's product. They also have a legal obligation to their shareholders to provide the best platform to make money and they have a legal obligation to implement restrictions that will prevent a risk to public health of safety.