What realistic choices do people have? I use iOS, but given the choice between a decent Android phone like the Moto E that you can get for less than $150 and a $650+ iPhone, I wouldn't advise most people to get an iPhone.
I prefer the Android experience, but switched back to iOS / iPhone a couple years back precisely because I did ask myself how much Apple’s better-but-not-robustly-verifiable privacy posture was. I decided that, over the life of a phone, that was worth at least $500 and the associated lesser UX.
I don’t know that a smartphone has to cost $650, but I don’t think most US corporations will sign up to deliver a $150 smartphone that doesn’t mine your privacy.