I am sorry I used GasBuddy as an example since I agree it is a stretch, but still not one I disagree with.
But let's get back to Apple...if it was functioning at "100% user privacy" would it be able to give access to your data to law enforcement? As an example, I consider MullvadVPN to be 99% user privacy.
I already linked to this article on Advanced Data Protection for iCloud (e2ee for most things) in a different comment, but it feels like a lot of people don’t know about this feature. It literally has zero effect on the user experience (except janky access to iCloud via the web, but shrug). Apple’s competitors don’t have anything close and their business models mean they probably never will.
The data stored on iCloud is locked with the key from the devices’ Secure Enclave. They’d have to unlock your device to get access to decrypt the iCloud data.