We copied Apple’s inventions, so now they’re de facto standards, thus patents shouldn’t be enforceable.
Apple’s point is that if you remove the IP distinctions between the two, you remove a key incentive for innovators to innovate. Apple spent billions in research and development to create the iPhone. It didn’t spend that money to create the iPhone’s competition. And this is a point Apple and CEO Tim Cook have hammered home again and again, since the smartphone IP Hundred Years War began.