i'm sorry, is that "freedom" guaranteed some place? i missed that passage in the constitution. feel free to point it out to me.
fact is plain and simple. you want to use an iphone, you agree to play by apple's rules. that means buying authorized apps only. jailbreaking is breaking your license agreement that you accepted when you bought their product. if you don't like the agreement you are free not to buy apple's product and go buy someone else's.
if you can't find a product with an agreement that you like, you are free to build your own.
there are your freedoms. you might want to start reading your EULA's. you'll find you have very little "freedoms".
PS. apple's license agreement for the iphone can be found
here.