Privacy is always about trust. I trust Apple (more than others) because they never gave me the impression they are doing anything shady with my personal data behind my back. Unlike Google.
Privacy is only about trust when you can't know what software does. That's only a concern with closed source software and services. Much of Apple's software is closed, much of Apple is based on services. The one thing you can trust is that, at some point, something they do with data they have will displease you. Software that doesn't even try to collect data is the only acceptable kind of software.
Using services obviously requires trust as far as data your client software exposes, but if you choose closed source clients, you've given up on privacy at a fundamental level.
Using services obviously requires trust as far as data your client software exposes, but if you choose closed source clients, you've given up on privacy at a fundamental level.