Given that Android has a 75% share[0] of the mobile OS market, that isn't really true. Apple is a gatekeeper for the 23% or so of mobile devices.
I think that giving end users control over what data about them is exfiltrated from their devices is a good thing. And assuming that applies to Apple apps as well, it sounds like a win for IOS users.
N.B.: I do not currently, nor have I ever owned an Apple device. Even the Apple ][ I built from a kit in high school was a clone and not Apple hardware.
[0] https://www.statista.com/statistics/272698/global-market-sha...
https://gs.statcounter.com/os-market-share/mobile/united-sta...
Not just "mobile first", but they were iPhone-only for the first eighteen months:
* https://techland.time.com/2012/04/03/no-joke-instagram-is-fi...
* https://www.cnn.com/2012/04/03/tech/mobile/instagram-android...