I suppose in a round-a-bout way, it could, more specifically around iMessage, which is Apple's baby in the US and a big part of their lock in effect for US users.
Right now, you can reasonably assume that using iMessage with another iPhone user that both ends are reasonably secure and private. Break open the walls of the garden and now you could say that you can't trust that the other end you are communicating with hasn't installed some random crapware or malware that's scraping their messages, or recording the screen during a facetime call, thereby compromising your own privacy by interacting with a bad devices.
In that instance, Apple is correct - but what Apple doesn't tell people is that all other forms of digital communication are open to the same risks so they aren't special.