A friend of mine had that happen with iOS (iCloud sync settings that she disabled changed after an OS update) so I wouldn't feel safe from this kind of trickery after the OS switch.
We don't know if Apple is violating our privacy. Who knows who Apple is selling your data to.
Google on the other hand have an entire business model which sells your data. I know who I'd trust with my data and TBH, I think you're just throwing stones without understanding your own subconscious bias against Apple.