That is good in theory. Reality, anyone you engage with that uses an Apple device has leaked your content / information to Apple. High confidence that Apple could easily build profiles on people that do not use their devices via this indirect action of having to communicate with Apple devices owners.

That statement above also applies to Google. There is now way not prevent indirect data sharing with Apple or Google.

And if you don't trust Apple with your data you shouldn't use a phone or internet at all.

Because as someone who has worked at a few telcos I can assure you that your phone and triangulated location data is stored, analysed and provided to intelligence agencies. And likewise this would be applying to ISPs.

That really is not a valid argument, since Apple have grown to be "the phone".

Also, many are unaware or unable to make the determination who or what will own their data before purchasing a device. One only accepts the privacy policy after one taps sign in... and is it really practical to expect people to do this by themselves when buying a phone? That's why regulation needs to step-in and enforce the right decisions are present by default.

But if you don't trust Google with your data, you can buy a device that runs Google's operating system, from Google, and flash somebody else's operating system onto it.

Or, if you prefer, you can just look at Google's code and verify that the operating system you put on your phone is made with the code you looked at.