Google is a privacy antagonist. Apple is privacy focused because it suits their business. Apple has been privacy focused for years and has built several technologies to prove it. It's not hollow marketing to build privacy software.
I don't define "privacy" as "only a single company has access to all my stuff", so to me Apple's claims are just marketing. I'd buy an argument about good security and some protection against other companies, just not "privacy".
Google is a "privacy antagonist" with an Open Source OS you can build locally and modify to your heart's content? And Apple's been privacy focused, suing security researchers for copyright violation when they try to analyze iOS?
Methinks you're holding a double standard. Compared to Android and Linux, Apple's "promise" is no better than the one Microsoft offers Bitlocker customers.