The only naiveté is self-inflicted by reading clickbait articles instead of how the system actually works. When people start worrying about Apple scanning for abstract subjects like "anti-government" they're worrying about some hypothetical system, not the one that's been built.
Your entire iPhone is a black box. If you don't trust Apple, there are so many points in the chain where they could backdoor you. The fact they are out in front of this is a good thing.
Also, I'm willing to sacrifice a tiny bit of privacy to stop child porn collections.
This[1] comment explains it very well. It just cements why I moved back to Linux on my laptop, and will be moving to something running open source software on my phone, and open hardware on all my devices.
That's the point. It's not an open to the public list, it's secret and controlled by few. It can contain whatever they want it to contain.
> Not how this system works.
That's absurdly naive.