I think more non-technical people care than you realize. The problem is that many of them care about the wrong things (misunderstanding what the systems are doing) or don't understand how to regain their privacy. They also largely distrust Apple because "It's just another company and they're all alike".

As an example of misunderstanding: Apple attempts to guess at pairs of phone numbers, email addresses, and names based on the data on the phone using analysis on the phone. So someone emailed a colleague a phone number (From: Bob, Body: "Hey, call me at 555-555-5555"). They get a call from 555-555-5555 and "Bob" comes up in the caller ID. It freaked them out, "I haven't added them to my contacts! Apple is reading my email!". This misunderstanding of what the systems are doing and how they're doing it creates an appearance of something "wrong" happening, even when it's not. The inability to distinguish these things leads to "they're all the same" and other perspectives that cause the non-technical people (especially, but even many technical people) to give up. They care, but they don't know how to overcome it (short of getting a dumb phone or a feature phone and moving off grid).