Customers in China probably make up a fairly large percentage of iPhone purchasers. So when Tim Cook preaches to the American audience about Apple's responsibility to protect information on iPhones, one wonders if foreign customers get the same respect.
We all know how repressive regimes like to keep tabs on their citizens, and it seems likely that if a particular product prevented that, it would be banned. Or more likely, the producer would be required to modify it so that the government could spy on it.
Maybe this is simply paranoid speculation. But it makes perfect sense.
As does this: A third party claims to have found a way to unlock an encrypted iPhone. Imagine that.