Apple is very much interested in user data, and they do use it .
They also use and deal in user data with other sources, like FB and Google .
It's well reported and has never been denied by Apple .
All that Apple keeps telling you is that allegedly an iPhone is hard to hack .
Hey Barmann: totaler Kackmist, was Du schreibst!
While others (Google etc.) want to convert your dignity into fast money, like any hooker, Apple has a principle that is good and with which they can earn money in a dignified way.
You have to be very young not to realize that the world is subordinated to different principles.
Just imagine Apple making money on data disclosure, too. The dam would be broken.
But that's not the case right now, you can collect the evidence if you don't want to ridicule the attempts to get something good. Then iOS in Europe would not be clarified for medicine (unlike Android), then future systems that need safe external protection (autonomous vehicles) would not be one of Apple's future development fields and much more.
If you want to act instead of talking: Request your iCloud data. If you know how to interpret the data received, fine, then you understand what data they use to keep just their ecosystem alive.
Furthermore, you'll understand what conflict Apple is in: It's supposed to be government conform (that's what it is in the case of support for e.g. state terrorism), but doesn't want to be the snitch for prosecution for any rape. I'm glad you won't be consulted in these discussions. They are difficult things.
Here again a link, which might light up the things for you somewhat.
https://support.apple.com/en-us/HT202303