You can jailbreak it and install whatever you want. But Apples app store has rules to primarily make Apple profit and also create an ecosystem with certain standards that Apple believes users would appreciate. (and judging by the sales numbers average users do)

You have the right to do with your property as you please, but what you really want is that Apple changes their product so it's easier for you to install what you like. You simply do not have this right. This limitation is well known and advertised so you should have known before you bought an iPhone, and even if you didn't - you can return the iPhone and get your money back.