Short story: I did a long trip across two continent with my wife. Me with an Android devices, her on iOS. We did backup our photos in our own private cloud but guess how we had to quick exchange photos while in the wild (no wifi and sometimes no network)? We couldn't. Because Google and Apple did everything so we couldn't.
Google wants to your data and fought for the cloud. Apple don't want Android users to easily partake in some data exchange with iOS users (you gotta buy your ticket to their jail). So sad you don't realize how backward that is.