One thing you have to consider when debating i0S versus Android in the context of privacy is: you can have the best of both worlds and own an Android phone
and an i0S device (if you can afford that, and I'm aware many citizens in third world countries don't have the luxury of owning two phones). It's like the old Chrome versus Firefox debates that happen every other month now on Hackernews & Reddit.
I own a Chromebook where I leverage the Google ecosystem and do Googley stuff all day, then a Thinkpad with Qubes+Whonix when I want privacy & security & sometimes anonymity.
You don't have to be faithful to a single company/OS/provider/whatever. You can leverage all the things and compartmentalize.