I totally disagree. I work for Apple, and I can tell you that for everything you do privacy is involved. It’s not just marketing.
Even the 2016 blackhat talk on youtube, which describes an elaborate signing mechanism for updates, doesn't preclude shipping targeted OS updates to individual users. Maybe I missed something though, and in that case I'd appreciate you pointing it out.
The reality is it’s way easier to just exploit a weakness that you can text someone [1].
But if you’re dressed in tin foil hat to toe, then there’s nothing that I can say to convince you. At that point I’d suggest not using any computing technology that you don’t personally build yourself and watch 24/7.
[1] https://www.nytimes.com/2020/01/21/technology/bezos-phone-ha...
Edit: Also, it's compelled speech though.